#7 YCCK -> CMYK conversion

[async.processingjs]

That's is more a request for information based on the https://sourceforge.net/tracker/?func=detail&aid=3403800&group_id=303195&atid=1278160 request.

Is the following assumption correct:
The libjpeg reads Adobe markers and makes right call about transform (YCCK or CMYK). If the application requests image in CMYK color space:
- for YCCK the libjpeg returns normal CMYK values (from 255 to 0);
- for CMYK the libjpeg returns inverted CMYK values (from 0 to 255)?