'color' signal for the widget problems

Hi guys,

Attached is a patch to the abiwidget that adds a 'color' signal that
fires when the text color changes (it passes 3 unsigned char's for the
rgb value, hence the need for the custom g_closure marshaller).

Can anyone see why this doesn't work? The callback is called just fine,
but in python I can't seem to get the proper values. In fact, it thinks
the arguments that are passed are *strings*, not
char/int/somethinglikethat values.

So I'm not sure if I just don't use it right in python, or that my patch
is wrong. Any help would be appreciated.

Thanks a lot!
  Marc