[Bug c++/92367] spurious -Wunused-but-set-parameter warning with constexpr if in a template function

[60rntogo at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92367

--- Comment #2 from Born Togo <60rntogo at gmail dot com> ---
That's perfect. For what it's worth, I did try searching for this bug report
first, but somehow didn't find it. Sorry for littering.