Fixed #7471 -- If the 400 response handler raises an exception, pass control to the 500 handler (if that then raises an exception, it's just not your day).
Fixed #7471 -- If the 400 response handler raises an exception, pass control to
the 500 handler (if that then raises an exception, it's just not your day).

Patch from Leah Culver.


git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@7988 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django