Expression parser: history index must be signed type.
Expression parser: history index must be signed type.

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