Fixed #9859 -- Added another missing force_unicode needed in admin when...

Fixed #9859 -- Added another missing force_unicode needed in admin when running on Python 2.3.  Many thanks for report & patch to nfg.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@9656 bcc190cf-cafb-0310-a4f2-bffc1f526a37