[Bug libstdc++/98370] libstdc++-v3/src/c++17/floating_to_chars.cc fails to compile unless `int32_t' is `int'

[hp at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98370

--- Comment #4 from Hans-Peter Nilsson <hp at gcc dot gnu.org> ---
JFTR, likely all "32-bit targets".