[gtk+/client-side-windows: 108/284] Don't send expose events if region is empty

[Alexander Larsson <alexl src gnome org>]

commit d82cee80c3a49de8fe4617838787b95741ba7f16
Author: Alexander Larsson <alex localhost localdomain>
Date:   Wed Jan 21 16:28:05 2009 +0100

    Don't send expose events if region is empty
---
 gdk/gdkwindow.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 9aaaeec..755bc5b 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -4389,7 +4389,8 @@ gdk_window_process_updates_recurse (GdkWindow *window,
       gdk_region_destroy (child_region);
     }
 
-  if (private->event_mask & GDK_EXPOSURE_MASK)
+  if (private->event_mask & GDK_EXPOSURE_MASK &&
+      !gdk_region_empty (expose_region))
     {
       GdkEvent event;