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might be the docs

Hi, Alex,

thanks!

The docs only say "can be zero" about the "black" value (which, in my case, is !=0), but not about cblack (which IS 0 for me). I think the docs could be improved by mentioning the same about the cblack values, would have helped me :-)
The 0 is in cblack even after "unpack()".

I don't see a problem here, it's really just minimizing headache for users ...

Update on my progress will come, I'm now trying to better understand the code with help of the ninedegrees article.

Mact