[gtk+/client-side-windows: 70/284] Don't destroy NULL region

[Alexander Larsson <alexl src gnome org>]

commit acf1954f122fef6654d66dd32a181a39440cd4c5
Author: Alexander Larsson <alexl redhat com>
Date:   Thu Dec 18 20:18:27 2008 +0100

    Don't destroy NULL region
---
 gdk/gdkwindow.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index ca5d30b..227d8b6 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -6311,7 +6311,8 @@ gdk_window_shape_combine_mask (GdkWindow *window,
 				   region,
 				   x, y);
 
-  gdk_region_destroy (region);
+  if (region)
+    gdk_region_destroy (region);
 }
 
 /**