finite-size fillBlocks checks its input box so it won't wrap around the edge of the level or try to use null slices
finite-size fillBlocks checks its input box so it won't wrap around the edge of the level or try to use null slices

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