patch applied (ghc-fc): Fix problem with selectors for GADT records with unboxed fields

[Kevin Donnelly]

Wed Aug  2 02:37:38 PDT 2006  kevind at bu.edu
  * Fix problem with selectors for GADT records with unboxed fields

    M ./compiler/basicTypes/MkId.lhs -2 +2
    M ./compiler/coreSyn/CoreUtils.lhs -11 +17
    M ./compiler/iface/TcIface.lhs -2 +2
    M ./compiler/simplCore/Simplify.lhs -2 +2