[pitivi] Make the EffectFactory release bins properly

[Edward Hervey <edwardrv src gnome org>]

commit 40630a841201bde5a10b6e1a11b851491a3da60b
Author: Thibault Saunier <tsaunier gnome org>
Date:   Thu Jul 15 13:41:46 2010 -0400

    Make the EffectFactory release bins properly

 pitivi/factories/operation.py |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/pitivi/factories/operation.py b/pitivi/factories/operation.py
index ed2ec09..3a8961c 100644
--- a/pitivi/factories/operation.py
+++ b/pitivi/factories/operation.py
@@ -93,6 +93,12 @@ class EffectFactory (TransformFactory):
 
         return bin
 
+    def _releaseBin(self, bin):
+        elements = bin.elements()
+        for element in elements.next():
+            del element #bin.remove(element)
+
+
     def addInputStream(self, stream):
         return OperationFactory.addInputStream(self, stream)