Fixed #12079: Changed has_results to get a single result, thus preventing...

Fixed #12079: Changed has_results to get a single result, thus preventing exists() from always returning True on backends that support chunked reads.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@11654 bcc190cf-cafb-0310-a4f2-bffc1f526a37