When a form in the admin has no fields prevent failure.
When a form in the admin has no fields prevent failure.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8698 bcc190cf-cafb-0310-a4f2-bffc1f526a37

--HG--
extra : convert_revision : 185de9db81e7ebaed6f28510bb747f313aa0d4f4

adieu/django-nonrel,adieu/django-nonrel,heracek/django-nonrel,heracek/django-nonrel,heracek/django-nonrel,adieu/django-nonrel