[xmonad] darcs patch: needs update for mplayer2

1 patch for repository http://code.haskell.org/xmonad: Thu Jul 3 07:43:59 CEST 2014 Joey Hess * needs update for mplayer2 xmonad floats mplayer by default. However, Debian has switched to mplayer2, and so on upgrade, it will stop floating. This can be easily fixed in the user's config file, but here is a patch that avoids bothering the user with breakage on upgrade.