[Yhc] Odd Show Double results

[Neil Mitchell]

Hi Ian

> main = do print (1/0 :: Double)
>           print ((-1)/0 :: Double)
>           print (0/0 :: Double)
>
> 1.797693134862316e308
> -1.797693134862316e308
> 2.696539702293474e308

Bug raised:

http://code.google.com/p/yhc/issues/detail?id=139

Thanks

Neil