[Xmonad] darcs patch: Main.hs: get rid off non-standard pattern guards.

Thu Jun 21 00:04:21 CEST 2007 joachim.fasting@gmail.com * Main.hs: get rid off non-standard pattern guards. Adds another import and looks a bit convoluted, but this is the best I could do. Also, any trailing non-numeric characters (as in --resume 9r) will be ignored, as this code just blindly calls fst if reads returns anything but an empty list (don't know if this is stupid or not).