[PATCH v2] Use #ifdef {HAVE, USE}_FOO instead of #if {HAVE, USE}_FOO

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While "#if USE_FOO" checks for the value of the variable USE_FOO,
"#ifdef" checks whether USE_FOO is defined or not.

It means, if we had something like: #define USE_FOO 0, we would have:
 #if USE_FOO
 /* Any code in here would NOT be compiled */
 #endif

 #ifdef USE_FOO
 /* Any code in here would be compiled */
 #endif

No problem was faced on spice-gtk till now because either USE_FOO is not
defined or defined as 1, but let's try to have it standardized.
---
 src/channel-smartcard.c  |  2 +-
 src/channel-usbredir.c   | 14 +++++++-------
 src/spice-channel.c      | 20 ++++++++++----------
 src/spice-gtk-session.c  |  4 ++--
 src/spice-widget.c       |  2 +-
 src/usb-device-manager.c |  2 +-
 6 files changed, 22 insertions(+), 22 deletions(-)

diff --git a/src/channel-smartcard.c b/src/channel-smartcard.c
index e2e1aad..7f3306e 100644
--- a/src/channel-smartcard.c
+++ b/src/channel-smartcard.c
@@ -244,7 +244,7 @@ smartcard_message_free(SpiceSmartcardChannelMessage *message)
     g_free(message);
 }
 
-#if USE_SMARTCARD
+#ifdef USE_SMARTCARD
 static gboolean is_attached_to_server(VReader *reader)
 {
     return (vreader_get_id(reader) != (vreader_id_t)-1);
diff --git a/src/channel-usbredir.c b/src/channel-usbredir.c
index 0be72ba..2206efc 100644
--- a/src/channel-usbredir.c
+++ b/src/channel-usbredir.c
@@ -24,7 +24,7 @@
 #ifdef USE_USBREDIR
 #include <glib/gi18n.h>
 #include <usbredirhost.h>
-#if USE_POLKIT
+#ifdef USE_POLKIT
 #include "usb-acl-helper.h"
 #endif
 #include "channel-usbredir-priv.h"
@@ -57,7 +57,7 @@
 
 enum SpiceUsbredirChannelState {
     STATE_DISCONNECTED,
-#if USE_POLKIT
+#ifdef USE_POLKIT
     STATE_WAITING_FOR_ACL_HELPER,
 #endif
     STATE_CONNECTED,
@@ -75,7 +75,7 @@ struct _SpiceUsbredirChannelPrivate {
     const uint8_t *read_buf;
     int read_buf_size;
     enum SpiceUsbredirChannelState state;
-#if USE_POLKIT
+#ifdef USE_POLKIT
     GSimpleAsyncResult *result;
     SpiceUsbAclHelper *acl_helper;
 #endif
@@ -241,7 +241,7 @@ static gboolean spice_usbredir_channel_open_device(
     int rc, status;
 
     g_return_val_if_fail(priv->state == STATE_DISCONNECTED
-#if USE_POLKIT
+#ifdef USE_POLKIT
                          || priv->state == STATE_WAITING_FOR_ACL_HELPER
 #endif
                          , FALSE);
@@ -275,7 +275,7 @@ static gboolean spice_usbredir_channel_open_device(
     return TRUE;
 }
 
-#if USE_POLKIT
+#ifdef USE_POLKIT
 static void spice_usbredir_channel_open_acl_cb(
     GObject *gobject, GAsyncResult *acl_res, gpointer user_data)
 {
@@ -358,7 +358,7 @@ void spice_usbredir_channel_connect_device_async(
     priv->device = libusb_ref_device(device);
     priv->spice_device = g_boxed_copy(spice_usb_device_get_type(),
                                       spice_device);
-#if USE_POLKIT
+#ifdef USE_POLKIT
     priv->result = result;
     priv->state  = STATE_WAITING_FOR_ACL_HELPER;
     priv->acl_helper = spice_usb_acl_helper_new();
@@ -415,7 +415,7 @@ void spice_usbredir_channel_disconnect_device(SpiceUsbredirChannel *channel)
     case STATE_DISCONNECTED:
     case STATE_DISCONNECTING:
         break;
-#if USE_POLKIT
+#ifdef USE_POLKIT
     case STATE_WAITING_FOR_ACL_HELPER:
         priv->state = STATE_DISCONNECTING;
         /* We're still waiting for the acl helper -> cancel it */
diff --git a/src/spice-channel.c b/src/spice-channel.c
index ff85715..1941b1b 100644
--- a/src/spice-channel.c
+++ b/src/spice-channel.c
@@ -119,7 +119,7 @@ static void spice_channel_init(SpiceChannel *channel)
     c->remote_common_caps = g_array_new(FALSE, TRUE, sizeof(guint32));
     spice_channel_set_common_capability(channel, SPICE_COMMON_CAP_PROTOCOL_AUTH_SELECTION);
     spice_channel_set_common_capability(channel, SPICE_COMMON_CAP_MINI_HEADER);
-#if HAVE_SASL
+#ifdef HAVE_SASL
     spice_channel_set_common_capability(channel, SPICE_COMMON_CAP_AUTH_SASL);
 #endif
     g_queue_init(&c->xmit_queue);
@@ -802,7 +802,7 @@ static void spice_channel_flush_wire(SpiceChannel *channel,
     }
 }
 
-#if HAVE_SASL
+#ifdef HAVE_SASL
 /*
  * Encode all buffered data, write all encrypted data out
  * to the wire
@@ -830,7 +830,7 @@ static void spice_channel_flush_sasl(SpiceChannel *channel, const void *data, si
 /* coroutine context */
 static void spice_channel_write(SpiceChannel *channel, const void *data, size_t len)
 {
-#if HAVE_SASL
+#ifdef HAVE_SASL
     SpiceChannelPrivate *c = channel->priv;
 
     if (c->sasl_conn)
@@ -932,7 +932,7 @@ reread:
     return ret;
 }
 
-#if HAVE_SASL
+#ifdef HAVE_SASL
 /*
  * Read at least 1 more byte of data out of the SASL decrypted
  * data buffer, into the internal read buffer
@@ -994,7 +994,7 @@ static int spice_channel_read(SpiceChannel *channel, void *data, size_t length)
     while (len > 0) {
         if (c->has_error) return 0; /* has_error is set by disconnect(), return no error */
 
-#if HAVE_SASL
+#ifdef HAVE_SASL
         if (c->sasl_conn)
             ret = spice_channel_read_sasl(channel, data, len);
         else
@@ -1268,7 +1268,7 @@ error:
     return FALSE;
 }
 
-#if HAVE_SASL
+#ifdef HAVE_SASL
 /*
  * NB, keep in sync with similar method in spice/server/reds.c
  */
@@ -1795,7 +1795,7 @@ static gboolean spice_channel_recv_link_msg(SpiceChannel *channel)
     } else {
         SpiceLinkAuthMechanism auth = { 0, };
 
-#if HAVE_SASL
+#ifdef HAVE_SASL
         if (spice_channel_test_common_capability(channel, SPICE_COMMON_CAP_AUTH_SASL)) {
             CHANNEL_DEBUG(channel, "Choosing SASL mechanism");
             auth.auth_mechanism = SPICE_COMMON_CAP_AUTH_SASL;
@@ -2167,7 +2167,7 @@ static void spice_channel_iterate_read(SpiceChannel *channel)
     ) { do
             spice_channel_recv_msg(channel,
                                    (handler_msg_in)SPICE_CHANNEL_GET_CLASS(channel)->handle_msg, NULL);
-#if HAVE_SASL
+#ifdef HAVE_SASL
             /* flush the sasl buffer too */
         while (c->sasl_decoded != NULL);
 #else
@@ -2632,7 +2632,7 @@ static void channel_reset(SpiceChannel *channel, gboolean migrating)
         c->connect_delayed_id = 0;
     }
 
-#if HAVE_SASL
+#ifdef HAVE_SASL
     if (c->sasl_conn) {
         sasl_dispose(&c->sasl_conn);
         c->sasl_conn = NULL;
@@ -2906,7 +2906,7 @@ void spice_channel_swap(SpiceChannel *channel, SpiceChannel *swap, gboolean swap
     SWAP(common_caps);
     SWAP(remote_caps);
     SWAP(remote_common_caps);
-#if HAVE_SASL
+#ifdef HAVE_SASL
     SWAP(sasl_conn);
     SWAP(sasl_decoded);
     SWAP(sasl_decoded_length);
diff --git a/src/spice-gtk-session.c b/src/spice-gtk-session.c
index 9ea28c4..4201ee0 100644
--- a/src/spice-gtk-session.c
+++ b/src/spice-gtk-session.c
@@ -19,7 +19,7 @@
 
 #include <glib.h>
 
-#if HAVE_X11_XKBLIB_H
+#ifdef HAVE_X11_XKBLIB_H
 #include <X11/XKBlib.h>
 #include <gdk/gdkx.h>
 #endif
@@ -139,7 +139,7 @@ static guint32 get_keyboard_lock_modifiers(void)
         modifiers |= SPICE_INPUTS_SCROLL_LOCK;
     }
 #else
-#if HAVE_X11_XKBLIB_H
+#ifdef HAVE_X11_XKBLIB_H
     Display *x_display = NULL;
     XKeyboardState keyboard_state;
 
diff --git a/src/spice-widget.c b/src/spice-widget.c
index a1a68a6..19753e7 100644
--- a/src/spice-widget.c
+++ b/src/spice-widget.c
@@ -20,7 +20,7 @@
 #include <math.h>
 #include <glib.h>
 
-#if HAVE_X11_XKBLIB_H
+#ifdef HAVE_X11_XKBLIB_H
 #include <X11/XKBlib.h>
 #include <gdk/gdkx.h>
 #endif
diff --git a/src/usb-device-manager.c b/src/usb-device-manager.c
index 647edd0..6e12602 100644
--- a/src/usb-device-manager.c
+++ b/src/usb-device-manager.c
@@ -393,7 +393,7 @@ static void spice_usb_device_manager_get_property(GObject     *gobject,
         break;
     case PROP_FREE_CHANNELS: {
         int free_channels = 0;
-#if USE_USBREDIR
+#ifdef USE_USBREDIR
         int i;
         for (i = 0; i < priv->channels->len; i++) {
             SpiceUsbredirChannel *channel = g_ptr_array_index(priv->channels, i);
-- 
2.5.0

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