[mutter] shaped-texture: Remove an unnecessary set to NULL

[Jasper St. Pierre <jstpierre src gnome org>]

commit 84a1b394a15f124bb4cb6faac112423ef3fbf242
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Tue Aug 27 17:17:15 2013 -0400

    shaped-texture: Remove an unnecessary set to NULL

 src/compositor/meta-shaped-texture.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)
---
diff --git a/src/compositor/meta-shaped-texture.c b/src/compositor/meta-shaped-texture.c
index 79e515e..385f80a 100644
--- a/src/compositor/meta-shaped-texture.c
+++ b/src/compositor/meta-shaped-texture.c
@@ -605,10 +605,7 @@ meta_shaped_texture_set_clip_region (MetaShapedTexture *stex,
   priv = stex->priv;
 
   if (priv->clip_region)
-    {
-      cairo_region_destroy (priv->clip_region);
-      priv->clip_region = NULL;
-    }
+    cairo_region_destroy (priv->clip_region);
 
   if (clip_region)
     priv->clip_region = cairo_region_copy (clip_region);