add a containsChunk to regionFile and call it from MCInfdevOldLevel.containsChunk instead of doing a region scan.
add a containsChunk to regionFile and call it from MCInfdevOldLevel.containsChunk instead of doing a region scan.

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