[cvs-nhc98] patch applied (hat): Improve the error message for incorrect newtypes, e.g.

[Malcolm Wallace]

Mon Jan  6 08:45:22 PST 2003  malcolm
  * Improve the error message for incorrect newtypes, e.g.
      newtype N = N a b
   =>
      Invalid rhs of newtype N, a newtype can rename only one type.

    M ./src/compiler98/RenameLib.hs +4