patch applied (ghc): Checking conformance of AT indexes with instance heads

[chak at cse.unsw.edu.au]

Wed Sep 20 11:39:37 PDT 2006  Manuel M T Chakravarty <chak at cse.unsw.edu.au>
  * Checking conformance of AT indexes with instance heads
  Mon Sep 18 19:18:18 EDT 2006  Manuel M T Chakravarty <chak at cse.unsw.edu.au>
    * Checking conformance of AT indexes with instance heads
    Wed Aug 30 20:13:52 EDT 2006  Manuel M T Chakravarty <chak at cse.unsw.edu.au>
      * Checking conformance of AT indexes with instance heads

    M ./compiler/typecheck/TcInstDcls.lhs -28 +129
    M ./compiler/typecheck/TcTyClsDecls.lhs -7 +16
    M ./compiler/types/TyCon.lhs -14 +30