Remove redundant 'n >= 0' check from shift.  (from David Roundy's 'simplify shift, removing unneeded check.' patch)
Remove redundant 'n >= 0' check from shift.  (from David Roundy's 'simplify shift, removing unneeded check.' patch)

darcs-hash:20070724145927-a5988-2e681f183964587aedd9d0b1e0ab33f7e25779ba

Happy-Ferret/xmonad