handler_map to receive device
handler_map to receive device

also cut redundant mapTo block in favor of ternary slot number

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