[1.0.X] Fixed #8910 -- Added force_unicode during admin log message creation...

[1.0.X] Fixed #8910 -- Added force_unicode during admin log message creation to avoid triggering a Python 2.3 bug. Thanks for the report joshg and patch nfg. 

[9383] from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9384 bcc190cf-cafb-0310-a4f2-bffc1f526a37