sanitize both grass and snow layer.  maybe more blocks in the future.
sanitize both grass and snow layer.  maybe more blocks in the future.

ahh2131/mchisel,ahh2131/mchisel,arruda/pymclevel,arruda/pymclevel,codewarrior0/pymclevel,mcedit/pymclevel,mcedit/pymclevel,codewarrior0/pymclevel