C++ header: added missing case breaks when handling signal callback handler overloading.
C++ header: added missing case breaks when handling signal callback handler overloading.

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