[1.0.X] Fixed #9224 -- Prevent a crash when certain query strings are sent using

modpython.

Backport of r9189 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@9190 bcc190cf-cafb-0310-a4f2-bffc1f526a37