[mutter] compositor: initial has_window to FALSE in sync_actor_stacking

[Ray Strode <halfline src gnome org>]

commit ddf566a3c4b5c4a24b5c01a06e8be4ad84385705
Author: Ray Strode <rstrode redhat com>
Date:   Tue Sep 3 16:03:17 2013 -0400

    compositor: initial has_window to FALSE in sync_actor_stacking
    
    Spotted by Jasper, discussed on IRC.

 src/compositor/compositor.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/compositor/compositor.c b/src/compositor/compositor.c
index 9a86444..5b936f0 100644
--- a/src/compositor/compositor.c
+++ b/src/compositor/compositor.c
@@ -1152,6 +1152,7 @@ sync_actor_stacking (MetaCompScreen *info)
    * we go ahead and do it */
 
   children = clutter_actor_get_children (info->window_group);
+  has_windows = FALSE;
   reordered = FALSE;
 
   /* We allow for actors in the window group other than the actors we