Fixed #8904 -- Improved error message when spatial lookup is not available, and changed exception to `ValueError` to prevent swallowing of error on queryset evaluation.
Fixed #8904 -- Improved error message when spatial lookup is not available, and changed exception to `ValueError` to prevent swallowing of error on queryset evaluation.


git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@12887 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django