Fixed #11087 -- Fixed the `Count` annotation when used with `GeoManager`. ...

Fixed #11087 -- Fixed the `Count` annotation when used with `GeoManager`.  Thanks to dgouldin for ticket and initial patch.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@10912 bcc190cf-cafb-0310-a4f2-bffc1f526a37