[clutter] stage: Protect call to unrealize() in dispose

[Emmanuele Bassi <ebassi src gnome org>]

commit c5ba998d64605b207b499221d7a484794e756c7a
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Fri Sep 9 13:53:33 2011 +0100

    stage: Protect call to unrealize() in dispose
    
    Do not call ClutterStageWindow::unrealize() if the Stage has already
    been unrealized.

 clutter/clutter-stage.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/clutter/clutter-stage.c b/clutter/clutter-stage.c
index fe02984..0abe9e9 100644
--- a/clutter/clutter-stage.c
+++ b/clutter/clutter-stage.c
@@ -1631,7 +1631,9 @@ clutter_stage_dispose (GObject *object)
     {
       CLUTTER_NOTE (BACKEND, "Disposing of the stage implementation");
 
-      _clutter_stage_window_unrealize (priv->impl);
+      if (CLUTTER_ACTOR_IS_REALIZED (object))
+        _clutter_stage_window_unrealize (priv->impl);
+
       g_object_unref (priv->impl);
       priv->impl = NULL;
     }