[cvs-nhc98] Fix error (nthcon: n==0 con==37) due to an interface file

[Malcolm Wallace]

> >     ifeq "${BUILDWITH}" "ghc"
> >     HEAP = +RTS -K2M -RTS
> >     endif
> 
> OK, thanks - presumably nhc or nhc98 rather than ghc though.

Well, it depends on what compiler you used to build the nhc98 that
is in turn being used to build the libraries. 

Regards,
    Malcolm