Word32.word -> Int32.int

[Stephen Weeks]

> Is it true that In32 is never mentioned in the basis library? 

As far as I know.

> If that is true
> then I guess that it makes some (but not much) sense.  Still, it would have
> been better to use something like the Position structure.  The problem is that
> with the current set up, IntInf's are going to be used in MLton for no reason.

Yeah.  The only solution I can see is a compiler switch that makes LargeInt =
Int.  I don't think that would be too hard.