Fix issue loading stats for 4 part s2gs files.
Fix issue loading stats for 4 part s2gs files.

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