[1.0.X] Fixed #10834 -- Added bucket condition to ensure that URL resolvers...

[1.0.X] Fixed #10834 -- Added bucket condition to ensure that URL resolvers won't ever return None. Thanks to Chris Cahoon for the patch.

Merge of r11120 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@11122 bcc190cf-cafb-0310-a4f2-bffc1f526a37