[cvs-nhc98] patch applied (hat): Fix the portable hat lib to build with nhc98.

[Malcolm Wallace]

Mon Jan 28 07:20:55 PST 2002  malcolm
  * Fix the portable hat lib to build with nhc98.
    * Use $(HC) in the makefile to switch compiler options.
    * Eliminate duplicate export of Bool() from PreludeBuiltin
    * Add (Integral a) context on instance of (Eq (Ratio a))

    M ./src/hatlib/Makefile -3 +9
    M ./src/hatlib/PreludeBasic.hs -1 +1
    M ./src/hatlib/PreludeBuiltin.hs -1 +1