[mutter] shaped-texture: Fix memory leak

[Adel Gadllah <agadllah src gnome org>]

commit 4009267c2ba2c037b93443ee235159c09e659284
Author: Pavel Vasin <rat4vier gmail com>
Date:   Sat Sep 14 16:20:41 2013 +0400

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

 src/compositor/meta-shaped-texture.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/compositor/meta-shaped-texture.c b/src/compositor/meta-shaped-texture.c
index 0529820..505232f 100644
--- a/src/compositor/meta-shaped-texture.c
+++ b/src/compositor/meta-shaped-texture.c
@@ -118,6 +118,7 @@ meta_shaped_texture_dispose (GObject *object)
   priv->paint_tower = NULL;
 
   g_clear_pointer (&priv->texture, cogl_object_unref);
+  g_clear_pointer (&priv->opaque_region, cairo_region_destroy);
 
   meta_shaped_texture_set_mask_texture (self, NULL);
   meta_shaped_texture_set_clip_region (self, NULL);