OGRGeometry equals throws exception when compared to None

[ninowalker]

The following generates an exception:

>>> from django.contrib.gis.gdal import OGRGeometry
>>> geom = OGRGeometry("POINT(0 0)")
>>> if geom == None:
...    print 1
... 
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.6/site-packages/Django-1.1.1-py2.6.egg/django/contrib/gis/gdal/geometries.py", line 166, in __eq__
    return self.equals(other)
  File "/usr/local/lib/python2.6/site-packages/Django-1.1.1-py2.6.egg/django/contrib/gis/gdal/geometries.py", line 397, in equals
    return self._topology(capi.ogr_equals, other)
  File "/usr/local/lib/python2.6/site-packages/Django-1.1.1-py2.6.egg/django/contrib/gis/gdal/geometries.py", line 385, in _topology
    raise TypeError('Must use another OGRGeometry object for topology operations!')
TypeError: Must use another OGRGeometry object for topology operations!

Equals (and other predicate methods), should probably test for None before dispatching to the C bindings. No?

[jbronn]

(In [12905]) Fixed #13256 -- OGRGeometry no longer raises an exception when compared to instances of different types. Thanks, ninowalker for the bug report.

[jbronn]

(In [12906]) [1.1.X] Fixed #13256 -- OGRGeometry no longer raises an exception when compared to instances of different types. Thanks, ninowalker for the bug report.

Backport of r12905 from trunk.