[xmonad] darcs patch: Do not warn about unknown ClientMessageEvents

[Adam Vogt]

* On Thursday, August 13 2009, Joachim Breitner wrote:

>Hi,
>
>a small cleanup in the EWMH module.
>
>Greetings,
>Joachim
>
>
>Thu Aug 13 00:29:17 CEST 2009  Joachim Breitner <mail at joachim-breitner.de>
>  * Do not warn about unknown ClientMessageEvents
>  Not all client messages are are meant to be handled by the wndow manager, so do
>  not complain when one is unknown.
>

Applied, thanks.