message: update comments to reflect code change
diff: @@ -60,7 +60,7 @@ public:
  // (spot/point light texture}
  //
  // +----+ +-+ +----+
  -// 0|....| <------------+ 0| | +-----------|0221| (e.g. offset=02, 2-point, 1-spot)
  +// 0|....| <------------+ 0| | +-----------|0230| (e.g. offset=02, 3-lights)
  // 1|....|<--------+ \ 1| | / | |
  // 2: : \ +---2|0|<------+ | |
  // 3: : <-------- \--------3|3| : :
  