Fixed #9252 -- Moved the try/except protecting against incorrect lookup params...

Fixed #9252 -- Moved the try/except protecting against incorrect lookup params to where the error is now raised, and added a test for this case.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@9245 bcc190cf-cafb-0310-a4f2-bffc1f526a37