Refactored django.views.admin.main to call opts.admin.get_field_objs() only once, and made sure no code accessed admin.fields directly, in preparation for an upcoming change
Refactored django.views.admin.main to call opts.admin.get_field_objs() only once, and made sure no code accessed admin.fields directly, in preparation for an upcoming change

git-svn-id: 4f9f921b081c523744c7bf24d959a0db39629563@263 bcc190cf-cafb-0310-a4f2-bffc1f526a37

alex/django-old,jamespacileo/django-france,alex/django-old,sam-tsai/django-old,mitsuhiko/django,jamespacileo/django-france,FlaPer87/django-nonrel,mitsuhiko/django,disqus/django-old,bfirsh/django-old,bfirsh/django-old,hugs/django,dcramer/django-compositepks,skevy/django,rawwell/django,aparo/django-nonrel,disqus/django-old,FlaPer87/django-nonrel,Smarsh/django,skevy/django,sam-tsai/django-old,Smarsh/django,django-nonrel/django-nonrel,aparo/django-nonrel,Instagram/django,rawwell/django,aparo/django-nonrel,jamespacileo/django-france,Instagram/django,Smarsh/django,FlaPer87/django-nonrel,sam-tsai/django-old,rawwell/django,t11e/django,skevy/django,Instagram/django,sam-tsai/django-old,alex/django-old,t11e/django,hugs/django,hugs/django,t11e/django,django-nonrel/django-nonrel,bfirsh/django-old,Smarsh/django,django-nonrel/django-nonrel,dcramer/django-compositepks,disqus/django-old,dcramer/django-compositepks,mitsuhiko/django