Fixed a subtle bug (really, an inconsistency) in ForeignKey that [8132]...

Fixed a subtle bug (really, an inconsistency) in ForeignKey that [8132] exposed by causing the model_forms test to fail.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@8138 bcc190cf-cafb-0310-a4f2-bffc1f526a37