Fixed bug in mapper_monitor_connection_modify - can't use props in NULL.
Fixed bug in mapper_monitor_connection_modify - can't use props in NULL.

johnty/libmapper,radarsat1/libmapper,davidhernon/libmapper,johnty/libmapper,radarsat1/libmapper,libmapper/libmapper,davidhernon/libmapper-admin2,malloch/libmapper,radarsat1/libmapper,malloch/libmapper,davidhernon/libmapper,davidhernon/libmapper,radarsat1/libmapper,radarsat1/libmapper,malloch/libmapper,davidhernon/libmapper-admin2,libmapper/libmapper,davidhernon/libmapper-admin2,libmapper/libmapper,johnty/libmapper,davidhernon/libmapper-admin2,johnty/libmapper,libmapper/libmapper,malloch/libmapper,libmapper/libmapper,malloch/libmapper,davidhernon/libmapper,davidhernon/libmapper,davidhernon/libmapper-admin2,johnty/libmapper,malloch/libmapper,libmapper/libmapper