postprocess.sublanguage.parse: in py3 map return an iterator but we want a list
postprocess.sublanguage.parse: in py3 map return an iterator but we want a list

fixes #444

olof/svtplay-dl,dalgr/svtplay-dl,selepo/svtplay-dl,selepo/svtplay-dl,dalgr/svtplay-dl,iwconfig/svtplay-dl,qnorsten/svtplay-dl,iwconfig/svtplay-dl,qnorsten/svtplay-dl,spaam/svtplay-dl,olof/svtplay-dl,spaam/svtplay-dl