[mutter] meta-background-actor: Fix compilation error

[Rui Matos <rtcm src gnome org>]

commit c37c74159261dbde5a20858b45a00c86649df4c0
Author: Rui Matos <tiagomatos gmail com>
Date:   Mon Nov 5 19:44:03 2012 +0100

    meta-background-actor: Fix compilation error

 src/compositor/meta-background-actor.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/compositor/meta-background-actor.c b/src/compositor/meta-background-actor.c
index ea2bf38..0f5840d 100644
--- a/src/compositor/meta-background-actor.c
+++ b/src/compositor/meta-background-actor.c
@@ -659,8 +659,8 @@ meta_background_actor_add_glsl_snippet (MetaBackgroundActor *actor,
       snippet = cogl_snippet_new (hook, declarations, code);
     }
 
-  if (hook == COGL_SNIPPET_HOOK_VERTEX ||
-      hook == COGL_SNIPPET_HOOK_FRAGMENT)
+  if (hook == META_SNIPPET_HOOK_VERTEX ||
+      hook == META_SNIPPET_HOOK_FRAGMENT)
     cogl_pipeline_add_snippet (priv->pipeline, snippet);
   else
     cogl_pipeline_add_layer_snippet (priv->pipeline, 0, snippet);