[Bug 873385] Random module fails on Doubles because of odd minBound behaviour

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=873385

--- Comment #5 from Jens Petersen  ---
(FWIW 64bit ghci gives:

Prelude> toInteger (minBound :: Int)
-9223372036854775808
)

Hugs seems to be assuming Int32, but something is indeed going
wildly wrong with "toInteger (minBound::Int)".

I looked at:

src/bignums.c:326:primFun(primIntToInteger) {        /* Conversion :: Int ->
Integer       */

but I am not familiar with hugs' internals and things
seems to get into deep water quickly.

BTW "toInteger (minBound + 1:: Int) -1"
and "toInteger (minBound -1:: Int) +1"
seem to give the expected answer.

I almost wonder if it would be better to drop 64bit arch build for hugs.