libmapper: fix comments for get_mappings* routines.
libmapper: fix comments for get_mappings* routines.

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