Fixed #15672 -- Fixed bug in core/handlers/wsgi.py where we were referring to...

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

git-svn-id: http://code.djangoproject.com/svn/django/trunk@15918 bcc190cf-cafb-0310-a4f2-bffc1f526a37