patch applied (ghc-6.8/ghc): fix for Simple9

[chak at cse.unsw.edu.au]

Thu Sep  6 10:17:03 PDT 2007  Tom Schrijvers <tom.schrijvers at cs.kuleuven.be>
  * fix for Simple9
  
  No longer include non-indexed arguments
  in lookup of matching type function clause.
  By including non-indexed (additional) arguments,
  the lookup always fails.

    M ./compiler/typecheck/TcTyFuns.lhs -3 +7