[Xmonad] darcs patch: clean up error handler

[Donald Bruce Stewart]

jcreigh:
> Tue Jun 12 23:01:50 MDT 2007  Jason Creighton <jcreigh at gmail.com>
>   * clean up error handler
>   Removes the unneed (AFAICT), x11_extras_default_error_handler function and only
>   prints errors on stderr. (printing to stdout has caused problems with the
>   statusbar in the past)

Applied.

-- Don