[magick-users] identify -verbose color count

[duc.sequere.aut.de.via.decede at imagemagick.org]

> On Imagemagick 6.3.7 (again, Q16, WinXP), the color count is no longer
> part of the output.  Is this deliberate?

Computing the number of unique colors is expensive and is generally not
very useful for images with a huge number of unique colors.  We introduced
a cutoff at 1024 colors.  If your image has less than 1024 colors they
are displayed with the 'identify -verbose' command.  What we'll do is
introduce a -unique option to the identify command to compute the number
of colors.