exporting points file from clipped datasets

[sexton]

New functionality to clip data by arbitrary polygon then add up works. Now we need to be able to export the added data set to a pts file. Error log below. Test name is no_test_clip1_inside_outside in test_geospatial_data.py

====================================================================== ERROR: test_clip1_inside_outside(self):

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Traceback (most recent call last):

File "test_geospatial_data.py", line 510, in test_clip1_inside_outside

G.export_points_file(FN)

File "T:\sandpits\jsexton\ANUGA\anuga_core\source\anuga\geospatial_data\geospa

tial_data.py", line 523, in export_points_file

self.get_all_attributes())

File "T:\sandpits\jsexton\ANUGA\anuga_core\source\anuga\geospatial_data\geospa

tial_data.py", line 675, in _write_pts_file

for key in write_attributes.keys():

AttributeError?: 'NoneType?' object has no attribute 'keys'

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[ole]

Fixed in changeset:3735