[Bug c++/87667] -Wformat + typed enum class - difference with clang

[lebedev.ri at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87667

--- Comment #2 from Roman Lebedev <lebedev.ri at gmail dot com> ---
(In reply to Jonathan Wakely from comment #1)
> It's a warning, why do you think either compiler is wrong?

Either it is incorrect to pass `enum class Enum : unsigned short`
when the format specifier is %hx (i.e. `unsigned short`),
and then the warning is justified; or the other way around,
it is correct to pass `Enum`, and the warning is not justified,
or needs different wording.