[metacity] display: ignore XSyncAlarmNotify in meta_spew_event

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 650fd09a0aa9582e66c325e69831abfcb790a000
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Sat Jun 29 20:07:28 2013 -0400

    display: ignore XSyncAlarmNotify in meta_spew_event

 src/core/display.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/core/display.c b/src/core/display.c
index 2abb425..1e56019 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -2963,6 +2963,9 @@ meta_spew_event (MetaDisplay *display,
   if (event->type == (display->damage_event_base + XDamageNotify))
     return;
 
+  if (event->type == (display->xsync_event_base + XSyncAlarmNotify))
+    return;
+
   switch (event->type)
     {
     case KeyPress: