changed GeoPt field to allow empty instantiation of class
changed GeoPt field to allow empty instantiation of class

also, fixed the GeoPt field to use __metaclass__ = models.SubfieldBase so we are certain the to_python method is always called.

anentropic/django-gmap-admin,madisona/django-google-maps,josesanch/django-google-maps,amites/django-gmap-admin,anentropic/django-gmap-admin,amites/django-gmap-admin,madisona/django-google-maps,madisona/django-google-maps,josesanch/django-google-maps