Fixed #9608: Ensured a Model's default repr() is printable even if its...

Fixed #9608: Ensured a Model's default repr() is printable even if its __unicode__ method raises a Unicode error.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@9475 bcc190cf-cafb-0310-a4f2-bffc1f526a37