#63 pngcrush prints libpng warnings to stderr in quiet mode

[steveh7]

When processing the attached PNG with the arguments "-q -ow" I see the following warning printed to stderr:

libpng warning: iCCP: profile 'icc': 'CMYK': invalid ICC profile color space

With the "q" flag, I expected no output unless there was a fatal error.

[Glenn Randers-Pehrson]

I'd rather not change the behavior of the "-q" option but will add a "-s" (or "-silent) option that suppresses warnings along with the rest of the console output.

[steveh7]

Thanks for the consideration!

[Glenn Randers-Pehrson]

Fixed in pngcrush-1.7.78