Fixed #12962: Made admin delete action work again. Thanks ptone, skevy, mlavin...

Fixed #12962: Made admin delete action work again. Thanks ptone, skevy, mlavin and anyone else I've missed.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@12813 bcc190cf-cafb-0310-a4f2-bffc1f526a37