Check for type differences with is_type for None safety.
Check for type differences with is_type for None safety.

StoicLoofah/sc2reader,GraylinKim/sc2reader,vlaufer/sc2reader,StoicLoofah/sc2reader,ggtracker/sc2reader,GraylinKim/sc2reader,vlaufer/sc2reader,ggtracker/sc2reader