Fix error with chunk height map updates
Fix error with chunk height map updates

Ref #185

SirCmpwn/TrueCraft,illblew/TrueCraft,SirCmpwn/TrueCraft,flibitijibibo/TrueCraft,illblew/TrueCraft,flibitijibibo/TrueCraft,christopherbauer/TrueCraft,thdtjsdn/TrueCraft,thdtjsdn/TrueCraft,flibitijibibo/TrueCraft,christopherbauer/TrueCraft,christopherbauer/TrueCraft,blha303/TrueCraft,blha303/TrueCraft,blha303/TrueCraft,thdtjsdn/TrueCraft,SirCmpwn/TrueCraft,illblew/TrueCraft