[1.0.X] Fixed #9859 -- Added another missing force_unicode needed in admin...

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

Also enhanced the new test to hopefully exercise all paths through the get_deleted_objects function, and fixed the errors pointed out by the beefed-up test.

r9656 and r9657 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9658 bcc190cf-cafb-0310-a4f2-bffc1f526a37