[pitivi] Enhance tearDown in the EffectFactory test

[Edward Hervey <edwardrv src gnome org>]

commit e8d83b2540c84b4fb278dba3801fe427dee1cc65
Author: Thibault Saunier <tsaunier src gnome org>
Date:   Thu May 20 17:26:45 2010 -0400

    Enhance tearDown in the EffectFactory test

 tests/test_factories_operation.py |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/tests/test_factories_operation.py b/tests/test_factories_operation.py
index b2c2de7..a7a5a95 100644
--- a/tests/test_factories_operation.py
+++ b/tests/test_factories_operation.py
@@ -34,7 +34,7 @@ from pitivi.factories.operation import VideoEffectFactory
 class TestVideoEffectFactory(TestCase):
     def setUp(self):
         TestCase.setUp(self)
-        self.factory = VideoEffectFactory ('identity', "identity")
+        self.factory = VideoEffectFactory ('identity', 'identity')
 
     def testMakeBin (self):
         bin = self.factory.makeBin()
@@ -46,4 +46,5 @@ class TestVideoEffectFactory(TestCase):
         self.factory.releaseBin(bin2)
 
     def tearDown(self):
-        self.factory = None
+        del self.factory
+        TestCase.tearDown(self)