Expression parser: fix bug in vectorizer when type is int or double.
Expression parser: fix bug in vectorizer when type is int or double.

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