Special case the component scaling for Lab image data when color converting.
Special case the component scaling for Lab image data when color converting.

Ignore-this: b1a8ae0e0b979025bee9ee2e95f91065

darcs-hash:20101020232828-f546f-0fffd8acd1a072e6ef38fe1bd9b93f75840e2916.gz

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