Changed ModelFormMetaclass to have the normal signature for a __new__ method. Allows extending the metaclass more normally.
Changed ModelFormMetaclass to have the normal signature for a __new__ method.
Allows extending the metaclass more normally.

Patch from Christian Tanzer. Refs #7617.


git-svn-id: 4f9f921b081c523744c7bf24d959a0db39629563@7847 bcc190cf-cafb-0310-a4f2-bffc1f526a37

bfirsh/django-old,skevy/django,bfirsh/django-old,jamespacileo/django-france,Instagram/django,mitsuhiko/django,alex/django-old,skevy/django,hugs/django,mitsuhiko/django,Smarsh/django,disqus/django-old,Smarsh/django,bfirsh/django-old,disqus/django-old,Instagram/django,hugs/django,alex/django-old,Smarsh/django,Instagram/django,hugs/django,dcramer/django-compositepks,t11e/django,sam-tsai/django-old,skevy/django,disqus/django-old,django-nonrel/django-nonrel,mitsuhiko/django,django-nonrel/django-nonrel,sam-tsai/django-old,dcramer/django-compositepks,sam-tsai/django-old,Smarsh/django,t11e/django,jamespacileo/django-france,django-nonrel/django-nonrel,t11e/django,alex/django-old,jamespacileo/django-france,sam-tsai/django-old,dcramer/django-compositepks