[Bug c++/78434] Incorrect warning about missing align_val_t for placement new

[marc.mutz at kdab dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78434

--- Comment #3 from Marc Mutz <marc.mutz at kdab dot com> ---
Possibly. I couldn't check later versions because trunk failed to compile for
me in i386.c.