Fixed #12312 -- Set the coordinate dimension on each component of geometry...

Fixed #12312 -- Set the coordinate dimension on each component of geometry collections after transform (refines GDAL bug workaround introduced in r11628).  Thanks, yourcelf for bug report.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@12878 bcc190cf-cafb-0310-a4f2-bffc1f526a37