id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
5438	GeometryProxy: evaluate empty string to None	Robert Coup	jbronn	"The following code:
{{{
from django.contrib.gis.test.geoapp.models import City
c = City()
c.point
}}}
throws an exception from `GeometryProxy.__get__`, because the `geom_value` is `''`, and so it tries to create a GEOSGeometry from it.

Attached patch and tests evaluates `''` (and `u''`) to `None` instead.
"		closed	GIS	gis		fixed	sprint		Unreviewed	1	0	0	0	0	0