patch applied (ghc): Fix Trac #2137: report correct location for shadowed binding

[Simon Peyton Jones]

Wed Apr  2 08:34:10 PDT 2008  simonpj at microsoft.com
  * Fix Trac #2137: report correct location for shadowed binding
  
  The error message generation for a shadowed binding was
  plain wrong, at least where the shadowed binding isn't
  top-level.  Just a typo really -- the fix is trivial.
  

    M ./compiler/rename/RnEnv.lhs -1 +1