[1.0.X] Fixed #9362 -- Prevented inline forms from overwriting the...

[1.0.X] Fixed #9362 -- Prevented inline forms from overwriting the content_type_id attribute on objets being inlined. Thanks to carljm for the report and patch.

Merge of r10667 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10671 bcc190cf-cafb-0310-a4f2-bffc1f526a37