Fixed #17944 -- Prevented an error in the user change page of the admin when...

Fixed #17944 -- Prevented an error in the user change page of the admin when the content of the password field doesn't match the expected format. Thanks saxix for the report and initial patch.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17775 bcc190cf-cafb-0310-a4f2-bffc1f526a37