qemu_driver.c: don't unlink(NULL) on OOM error path

* src/qemu/qemu_driver.c (qemudDomainMigratePrepareTunnel): Upon an
out of memory error, we would end up with unixfile==NULL and attempt
to unlink(NULL).  Skip the unlink when it's NULL.

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 56bcec5ffe580c21b21b00e2e22e0c3ae7408144..c782f0dab913fa74bf862d1e77b18b3a9a61716b 100644 (file)
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -6903,7 +6903,8 @@ endjob:
 
 cleanup:
     virDomainDefFree(def);
-    unlink(unixfile);
+    if (unixfile)
+        unlink(unixfile);
     VIR_FREE(unixfile);
     if (vm)
         virDomainObjUnlock(vm);