fix wrong interpretation of terrain height
fix wrong interpretation of terrain height

psiorx/drake,scottviteri/drake,billhoffman/drake,astrorog/drake,sheim/drake,astrorog/drake,tkoolen/drake,edowson/drake,edowson/drake,psiorx/drake,edowson/drake,tkoolen/drake,crogers3/drake,sheim/drake,tkoolen/drake,hanssusilo/drake,hanssusilo/drake,billhoffman/drake,thientu/drake,sheim/drake,billhoffman/drake,scottviteri/drake,manuelli/drake,tkoolen/drake,thientu/drake,thientu/drake,crogers3/drake,tkoolen/drake,astrorog/drake,edowson/drake,thientu/drake,edowson/drake,billhoffman/drake,hanssusilo/drake,billhoffman/drake,psiorx/drake,crogers3/drake,thientu/drake,manuelli/drake,hanssusilo/drake,billhoffman/drake,psiorx/drake,sheim/drake,sheim/drake,astrorog/drake,psiorx/drake,crogers3/drake,thientu/drake,manuelli/drake,astrorog/drake,crogers3/drake,scottviteri/drake,tkoolen/drake,scottviteri/drake,astrorog/drake,sheim/drake,crogers3/drake,manuelli/drake,tkoolen/drake,edowson/drake,manuelli/drake,sheim/drake,astrorog/drake,psiorx/drake,crogers3/drake,sheim/drake,scottviteri/drake,psiorx/drake,manuelli/drake,billhoffman/drake,hanssusilo/drake,hanssusilo/drake,scottviteri/drake,edowson/drake,hanssusilo/drake,billhoffman/drake,crogers3/drake,hanssusilo/drake,scottviteri/drake,thientu/drake,manuelli/drake,edowson/drake,psiorx/drake