[1.1.X] Fixed #10969: Made US State field a CharField, fixing a few oddities...

[1.1.X] Fixed #10969: Made US State field a CharField, fixing a few oddities in its behavior. Thanks Paul McLanahan.

r11847 from trunk.



git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@11859 bcc190cf-cafb-0310-a4f2-bffc1f526a37