[Ecls-list] gmp bitness on 32bit msvc

[red plait]

Hi

> Why would you want 32 bit ECL with 64 bit GMP?
> Wouldn't that be less efficient?
Yes, but I want to embed ECL in 32bit application which operate with
64bit numbers. So I want to have functions ecl_to_uint64_t &
ecl_to_int64_t for binding making. Unfortunately in current time it
seems only possibility to have this functions on 32bit - when all
numbers inside ECL presented as ecl_int64_t which currently can be
achieved only when _WIN64 defined - see msvc/config.h.msvc6