Undefined reference fmt::v5::format_error::~format_error() when building dll

[HazardyKnusperkeks]

Hi, same setup as in #1204.

I get multiple

<file>: (.text+0x2c): undefined reference to `fmt::v5::format_error::~format_error()'

The destructor was added in commit 1c3197b defined in format-inl.h, but in I only #include <fmt/format.h>. I think it should be added there, or the class has to be exported.

[vitaut]

The destructor should be marked with FMT_API. Could you submit a PR?

[HazardyKnusperkeks]

Done.