If filterTags does not include a return statement, ogr2osm blows up
Traceback (most recent call last):
File "./ogr2osm.py", line 570, in <module>
output()
File "./ogr2osm.py", line 528, in output
for (key, value) in featuresmap[node].tags.items():
AttributeError: 'NoneType' object has no attribute 'items'
If filterTags does not include a return statement, ogr2osm blows up