[FFmpeg-cvslog] mathematics: Don't use division by zero in NAN/INFINITY macros

[Reimar Döffinger]

On 1 Jul 2012, at 22:48, git at videolan.org (Ronald S. Bultje) wrote:

> ffmpeg | branch: master | Ronald S. Bultje <rsbultje at gmail.com> | Fri Jun 22 13:05:21 2012 +0300| [a1245d5ca1bed154a3bf38843b63018ae3544115] | committer: Martin Storsjö
> 
> mathematics: Don't use division by zero in NAN/INFINITY macros
> 
> Some compilers, MSVC among them, don't recognize the divisions by
> zero as meaning infinity/nan.
> 
> These macros should, according to the standard, expand to constant
> expressions, but this shouldn't matter for our usage.

mathematics.h to my knowledge is an installed header, IMHO this is an API change and changes should not be made looking only at what FFmpeg needs.
Also at least for INF I believe the correct way is to define it to _HUGE_VAL for MSVC.