[1.3.X] Fixed #15672 -- Fixed bug in core/handlers/wsgi.py where we were...

[1.3.X] Fixed #15672 -- Fixed bug in core/handlers/wsgi.py where we were referring to the 'request' variable before assigning to it. Thanks for the report, vkryachko

Backport of r15918 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.3.X@16009 bcc190cf-cafb-0310-a4f2-bffc1f526a37