[gtk+] Don't read non-initialized clip region

[Alexander Larsson <alexl src gnome org>]

commit 7adf894a29d87ba85f0d27f71e2480caf53dae79
Author: Alexander Larsson <alexl redhat com>
Date:   Sat Jul 18 21:55:17 2009 +0200

    Don't read non-initialized clip region
    
    The clip region is only initialized (and needed) for viewable windows.

 gdk/gdkwindow.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 35416b4..10fc70a 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -7269,7 +7269,7 @@ gdk_window_shape_combine_region (GdkWindow       *window,
     gdk_region_destroy (private->shape);
 
   old_region = NULL;
-  if (GDK_WINDOW_IS_MAPPED (window))
+  if (private->viewable)
     old_region = gdk_region_copy (private->clip_region);
 
   if (shape_region)