Fixed #17728 -- When filtering an annotation, ensured the values used in the...

Fixed #17728 -- When filtering an annotation, ensured the values used in the filter are properly converted to their database representation. This bug was particularly visible with timezone-aware DateTimeFields. Thanks gg for the report and Carl for the review.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17576 bcc190cf-cafb-0310-a4f2-bffc1f526a37