Converted #ifndef/#define to #pragma once. Minor fix to a comment.
Converted #ifndef/#define to #pragma once. Minor fix to a comment.

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