small fixes for optimized image tilesets
small fixes for optimized image tilesets

seanisom/vtp,nakijun/vtp,seanisom/vtp,nakijun/vtp,seanisom/vtp,nakijun/vtp,seanisom/vtp,markraz/vtp,markraz/vtp,nakijun/vtp,markraz/vtp,nakijun/vtp,seanisom/vtp,markraz/vtp,markraz/vtp