[PATCH virt-viewer] Fix recent --spice-controller regression, add error message

[Marc-André Lureau <marcandre.lureau@xxxxxxxxx>]

The current code will attempt to dereference args if
--spice-controller, even if args is NULL.

Let's not accept any extra argument/uri on the command line if using
the controller. Beside, the conditionnal block looks better outside of
the if condition.
---
 src/remote-viewer-main.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/remote-viewer-main.c b/src/remote-viewer-main.c
index f60edb6..1289f1c 100644
--- a/src/remote-viewer-main.c
+++ b/src/remote-viewer-main.c
@@ -252,11 +252,15 @@ main(int argc, char **argv)
 
     g_option_context_free(context);
 
-    if ((!args || (g_strv_length(args) != 1))
 #if HAVE_SPICE_GTK
-        && !controller
+    if (controller) {
+        if (args) {
+            g_printerr(_("Error: extra arguments given while using Spice controller\n"));
+            goto cleanup;
+        }
+    } else
 #endif
-        ) {
+    if (!args || (g_strv_length(args) != 1)) {
         if (connect_dialog(&uri) != 0)
             goto cleanup;
     } else {
-- 
1.7.7.6