Custom icons per window class/name patch

[Ralf Habacker]

Hi Erle,

> > Most tests have 24-bpp icons, if someone has a 16-bpp icon it would
> > be a good thing to test!
>
> Qt-application like designer, linguist and assistant provides icons
> with 16bbp.
> It may be installed on the linux box.
>
after applying your last patch I've checked the above mentioned applications.
The icons are shown without any errors.

Great work.

Cheers
Ralf