Some tests

[Richard Hughes]

2009/12/2 Pascal de Bruijn <pmjdebruijn at pcode.nl>:
> LUT profiles have a normal white point defined, I think Lars ment, it
> would be nice to invert the color of the whitepoint cross, so it's
> visible on the black CIE diagram.

commit 6c77c29086ab851bec34c5667d0963bb32ec9217
Author: Richard Hughes <richard at hughsie.com>
Date:   Thu Dec 3 11:41:21 2009 +0000

    Show the white point cross in white if the CIE chart is all black

Richard.