[pitivi] elements: Don't try to cleanup Clutter.Actors.

[Thibault Saunier <tsaunier src gnome org>]

commit 53bf0165c27318aa73f379239827ba161f39a1e1
Author: Mathieu Duponchelle <mathieu duponchelle epitech eu>
Date:   Fri Sep 27 01:07:55 2013 +0200

    elements: Don't try to cleanup Clutter.Actors.

 pitivi/timeline/elements.py |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/pitivi/timeline/elements.py b/pitivi/timeline/elements.py
index 3544d71..4fb183d 100644
--- a/pitivi/timeline/elements.py
+++ b/pitivi/timeline/elements.py
@@ -1137,7 +1137,10 @@ class URISourceElement(TimelineElement):
 
     def cleanup(self):
         if self.preview:
-            self.preview.cleanup()
+            try:
+                self.preview.cleanup()
+            except AttributeError:  # preview was just an actor.
+                pass
         self.leftHandle.cleanup()
         self.leftHandle = None
         self.rightHandle.cleanup()