Now take advantage of new argument accepted by `AddGeometryColumn` in SpatiaLite 2.3 that allows geometry columns to specified as `NOT NULL`.
Now take advantage of new argument accepted by `AddGeometryColumn` in SpatiaLite 2.3 that allows geometry columns to specified as `NOT NULL`.

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%4010443

Belgabor/django,Belgabor/django,Belgabor/django