[Xmonad] Xinerama screen numbering seems to have changed

[Bruce Stephens]

It seems that they're numbered from 1 rather than 0, so everything
works OK if I do

hunk ./Config.hs 175
-        | (key, sc) <- zip [xK_w, xK_e, xK_r] [0..]
+        | (key, sc) <- zip [xK_w, xK_e, xK_r] [1..]

and make the appropriate change to dmenuXinerama.  Is that a
deliberate change?  (I'm indifferent to it; I'm just slightly
concerned I might have broken something in my local build.)