SWIG/Python bindings: fixed bug in slot object property_by_index method.
SWIG/Python bindings: fixed bug in slot object property_by_index method.

radarsat1/libmapper,malloch/libmapper,johnty/libmapper,malloch/libmapper,libmapper/libmapper,libmapper/libmapper,johnty/libmapper,radarsat1/libmapper,malloch/libmapper,johnty/libmapper,malloch/libmapper,radarsat1/libmapper,libmapper/libmapper,libmapper/libmapper,johnty/libmapper,radarsat1/libmapper,malloch/libmapper,radarsat1/libmapper,johnty/libmapper,libmapper/libmapper,malloch/libmapper,libmapper/libmapper