Fixed command 'scn', 'SCN' argument handling in interpreter
Fixed command 'scn', 'SCN' argument handling in interpreter

'scn'/'SCN' return set colorspace status, and number of object consumed.
if number is 0, then consumed an name object, otherwise, number of numerals are consumed.

bluegum/PegDF,bluegum/PegDF,bluegum/PegDF,bluegum/PegDF,bluegum/PegDF,bluegum/PegDF,bluegum/PegDF,bluegum/PegDF