[1.2.X] Fixed #10970 -- Initialize DateFields with datetime.date objects, not...

[1.2.X] Fixed #10970 -- Initialize DateFields with datetime.date objects, not datetime.datetime. Thanks, summerisgone, Cyberj and Ramiro Morales.

Backport from trunk (r14029).

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@14030 bcc190cf-cafb-0310-a4f2-bffc1f526a37