Tweaked the unset primary key check from [5933] to accommodate models created in the oldforms style. It's a backwards-compatibility hack that we can remove when oldforms go away. See #2160 for discussion. Fixed #5204, #2160. Refs #5102.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@5934 bcc190cf-cafb-0310-a4f2-bffc1f526a37