patch applied (ghc): Refactor where an error message is generated

[Simon Peyton Jones]

Tue Jul 13 04:57:33 PDT 2010  simonpj at microsoft.com
  * Refactor where an error message is generated

    M ./compiler/typecheck/TcInstDcls.lhs -27 +7
    M ./compiler/typecheck/TcTyClsDecls.lhs -2 +20

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20100713115733-1287e-37c8d4f06fc1affba3d71fa435f61f7d7ca778ec.gz