Fixed #10796 -- Corrected a pickling problem introduced by [10522]. Thanks to...

Fixed #10796 -- Corrected a pickling problem introduced by [10522]. Thanks to carljm for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10526 bcc190cf-cafb-0310-a4f2-bffc1f526a37