darcs patch: Don't colourize if HsColour isn't available.

[Ian Lynagh]

On Sun, Jan 11, 2009 at 12:21:20PM +0100, Matthias Kilian wrote:
> On Sun, Jan 11, 2009 at 11:53:24AM +0100, Matthias Kilian wrote:
> > 
> > Sun Jan 11 11:50:41 CET 2009  Matthias Kilian <kili at outback.escape.de>
> >   * Don't colourize if HsColour isn't available.
> 
> Errr... this is incomplete, some more files should be touched
> (Makefile, libraries/Makefile, mk/validate-settings.mk). I'll send
> a better patch later.

We also don't necessarily want the build to silently go through if
HsColour isn't available. On the nightly builds at least, we want to be
told something is wrong, so we don't make a release with sourceless
docs.


Thanks
Ian