patch applied (ghc): Fixups to PelRules (esp using intResult, wordResult)

[Simon Peyton Jones]

Mon Nov 13 01:05:17 PST 2006  simonpj at microsoft.com
  * Fixups to PelRules (esp using intResult, wordResult)
  
  In PrelRules we carefully use 'intResult' to trim off the overflow in
  compile-time calculations, but we were not doing so consistently.  This
  patch fixes that, I think, and adds type signatures
  

    M ./compiler/prelude/PrelRules.lhs -6 +12