Added a minor performance optimization. Since VLD blocks are now CRT blocks, and neither VLD blocks nor CRT blocks are ever added to the map, CRT blocks (which includes VLD blocks) can be skipped altogether when looking up blocks in the map.
Added a minor performance optimization. Since VLD blocks are now CRT blocks, and neither VLD blocks nor CRT blocks are ever added to the map, CRT blocks (which includes VLD blocks) can be skipped altogether when looking up blocks in the map.

zcnet4/vld,dmoulding/vld,erdincay/vld,smanders/vld,akaStiX/vld,slideclick/vld,ioannis-e/vld,akaStiX/vld,slideclick/vld,erdincay/vld,KindDragon/vld,ioannis-e/vld,KindDragon/vld,zcnet4/vld,dmoulding/vld,smanders/vld