patch applied (cabal): Fix warnings

[Ian Lynagh]

Mon May 14 10:11:24 PDT 2007  Ian Lynagh <igloo at earth.li>
  * Fix warnings

    M ./Distribution/Simple/Configure.hs -2 +1
    M ./Distribution/Simple/GHC.hs -3 +3
    M ./Distribution/Simple/Hugs.hs -1 +1
    M ./Distribution/Simple/Install.hs -1
    M ./Distribution/Simple/Register.hs -2 +2