Initial review request of a warning patch in math.h

[Florian Weimer]

* Krystian Kuźniarek via Libc-help:

> I found a very trivial warning about a training comma at the end of
> enumerator list. This generates a warning both on GCC and Clang since a
> trailing comma thing is a C99/C++11 extension.
>
> Enclosed you'll find a one-liner patch. Please let me know if this has any
> chance of being submitted.

I think the question is why one would use a C2X extension in a pre-C99
mode.  As far as I can tell, this is a rather odd combination.

Thanks,
Florian