[mutter] window: Fix memory leak

[Adel Gadllah <agadllah src gnome org>]

commit 8a370c00947b8d6b020593ebe2ef78539a1755b3
Author: Pavel Vasin <rat4vier gmail com>
Date:   Sat Sep 14 16:19:46 2013 +0400

    window: Fix memory leak
    
    https://bugzilla.gnome.org/show_bug.cgi?id=708070

 src/core/window.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index 9b49cfb..002e4c5 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -234,6 +234,9 @@ meta_window_finalize (GObject *object)
   if (window->frame_bounds)
     cairo_region_destroy (window->frame_bounds);
 
+  if (window->shape_region)
+    cairo_region_destroy (window->shape_region);
+
   if (window->opaque_region)
     cairo_region_destroy (window->opaque_region);