preparation for colour printing

[Dirk Hohndel]

Amit Chaudhuri <amit.k.chaudhuri at gmail.com> writes:

> Hi,
>
> this patch adds a 3rd column to the media array of rgba so we now have one
> each for screen, b/w & colour printing.  I have defaulted to using the same
> colour printing & screen, but this can be altered anytime.
>
> I have checked that the application still compiles and prints.  The print
> out (colour option selected) shows the deco ceiling steps in pink but
> everything else appears grey scale.  Further work will be required to apply
> the colours to the print out, although I'm not yet sure what that involves.

I just pushed this patch out. What it is missing is hooking things up in
print.c. Right now we simply set gc.printer to 1 there, instead we need
to be able to chose 1 or 2, depending on whether the user wants bw or
color printing.

/D