[clutter] Use g_clear_object() instead of unref() + NULL

[Emmanuele Bassi <ebassi src gnome org>]

commit 552a9496951e7f62729a79a3d57c82d3805f9519
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Tue Mar 20 11:22:07 2012 +0000

    Use g_clear_object() instead of unref() + NULL

 clutter/clutter-actor.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/clutter/clutter-actor.c b/clutter/clutter-actor.c
index 16266f1..a092332 100644
--- a/clutter/clutter-actor.c
+++ b/clutter/clutter-actor.c
@@ -3180,8 +3180,7 @@ add_or_remove_flatten_effect (ClutterActor *self)
           /* Destroy the effect so that it will lose its fbo cache of
              the actor */
           _clutter_actor_remove_effect_internal (self, priv->flatten_effect);
-          g_object_unref (priv->flatten_effect);
-          priv->flatten_effect = NULL;
+          g_clear_object (&priv->flatten_effect);
         }
     }
 }
@@ -15907,7 +15906,7 @@ clutter_actor_set_layout_manager (ClutterActor         *self,
                                             G_CALLBACK (on_layout_manager_changed),
                                             self);
       clutter_layout_manager_set_container (priv->layout_manager, NULL);
-      g_object_unref (priv->layout_manager);
+      g_clear_object (&priv->layout_manager);
     }
 
   priv->layout_manager = manager;
@@ -17599,7 +17598,7 @@ clutter_actor_set_content (ClutterActor   *self,
   if (priv->content != NULL)
     {
       _clutter_content_detached (priv->content, self);
-      g_object_unref (priv->content);
+      g_clear_object (&priv->content);
     }
 
   priv->content = content;