Added more robust processing to parameterised syndication feeds for the case

when all the "extra" URL bits are accidentally omitted. Patch from Niran
Babalola <niran@niran.org>. Fixed #5855.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@7295 bcc190cf-cafb-0310-a4f2-bffc1f526a37