Do bounds checking for faxd scanlines.
Do bounds checking for faxd scanlines.

darcs-hash:20090522223639-86a4e-f42912834a7f94181047f560bce5a9a0757126e3.gz

nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf,nqv/mupdf