Compilation of happy crashes

[Simon Marlow]

> /usr/local/bin/ghc -ldl -cpp -fglasgow-exts -package lang -O=20
> -O  -H10m  -c Main.lhs -o Main.o
> ghc-5.01: fatal error: scavenge_mut_once_list: strange object? 35540
>=20
> "Of course" it passed with -H10m option removed.

I think I've fixed this now.

Cheers,
	Simon