qemu: Change coalesce settings on hotplug when they are different

Part of the condition was reverted so no value update was propagated
through.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1414627Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>

src/qemu/qemu_hotplug.c

@@ -3283,8 +3283,8 @@ qemuDomainChangeNet(virQEMUDriverPtr driver,
 
     if (!!olddev->coalesce != !!newdev->coalesce ||
         (olddev->coalesce && newdev->coalesce &&
-         !memcmp(olddev->coalesce, newdev->coalesce,
-                 sizeof(*olddev->coalesce))))
+         memcmp(olddev->coalesce, newdev->coalesce,
+                sizeof(*olddev->coalesce))))
         needCoalesceChange = true;
 
     /* FINALLY - actually perform the required actions */