ColorGray shade(0.0)

Hi List,

I hope this is the right place for reporting, what I think, is a strange
behavior of the ColorGray class of Magik++.

I am trying to set the pixel color of an image this way:

ColorGray color;
color.shade(v);
aImage.pixelColor(color);

But every time v is 0.0, an exception is thrown at aImage.pixelColor(color):


Magick: Color argument is invalid reported by
\home\bfriesen\GraphicsMagick\1.1\Magick++\lib\Exception.cpp:272
(Magick::throwExceptionExplicit)


If I use ColorRGB and set red, green and blue to 0.0, it is working out as
expected. 

Also reading out ColorGray pixel colors from a loaded gray scale image,
returns 0.0 as expected. 

Is this a problem of the API respectively the class or do I simply not
understand the deeper meaning.

Any comment is welcome. 

Thanks in advance,
Lars



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