make shadings safer while waiting for jeong
make shadings safer while waiting for jeong

darcs-hash:20050111190617-f546f-3f7c7660b1fce6e454613952aea1fbb449b8b867.gz

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