[cvs-nhc98] patch applied (hat): Foreign importing a C function :: () -> res was rather nasty because

[Malcolm Wallace]

Thu May 18 09:34:59 PDT 2000  malcolm
  * Foreign importing a C function :: () -> res was rather nasty because
  it tried to pluck a value of void type from Haskell and give it to C -
  also the actual C call then tried to use the value!  I've done a small
  hack so that a function of arity=1 with arg () goes through fine.  I
  can't see anyone needing to pass a () arg for any reason other than
  to force re-evaluation on multiple calls, so that should be ok I hope.

    M ./src/compiler98/Foreign.hs -5 +22