[PATCH] qemu: Don't fail driver startup with ancient qemu

[Jiri Denemark <jdenemar@xxxxxxxxxx>]

Failure to extract version info (e.g., because qemu binary is so ancient
that it doesn't even support -help) shouldn't be considered fatal since
we only need it to detect whether qemu supports bootindex option.
---
 src/qemu/qemu_capabilities.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index f86e7f5..6d2a3f6 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -554,9 +554,10 @@ qemuCapsInitGuest(virCapsPtr caps,
         !virCapabilitiesAddGuestFeature(guest, "cpuselection", 1, 0))
         goto error;
 
-    if (qemuCapsExtractVersionInfo(binary, info->arch, NULL, &qemuCaps) < 0 ||
-        (qemuCapsGet(qemuCaps, QEMU_CAPS_BOOTINDEX) &&
-         !virCapabilitiesAddGuestFeature(guest, "deviceboot", 1, 0)))
+    if (qemuCapsExtractVersionInfo(binary, info->arch,
+                                   NULL, &qemuCaps) == 0 &&
+        qemuCapsGet(qemuCaps, QEMU_CAPS_BOOTINDEX) &&
+        !virCapabilitiesAddGuestFeature(guest, "deviceboot", 1, 0))
         goto error;
 
     if (hvm) {
-- 
1.7.4.1

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