[CLN-list] CLN and GiNaC patches for Win64 build

[Richard B. Kreckel]

On 05/01/2018 07:15 PM, Bruno Haible wrote:
> Patch "Force correct underlying type of float_format_t for Win64 platform"
> * What is the issue/symptom, and why does it not appear with other compilers
>   than MSVC?

That is clearly a bug in MSVC:
<https://www.ginac.de/pipermail/cln-list/2018-March/000707.html>

But forcing the enum's underlying type as suggested by Jan's patch is
both standard-compliant and more expressive than my old hack.

  -richy.