Snippets for msgpack-cxx 7.0.0 from Alpine armhf

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-armhf/community/msgpack-cxx/msgpack-cxx-7.0.0-r1.log.

• /home/buildozer/aports/community/msgpack-cxx/src/msgpack-cxx-7.0.0/include/msgpack/v1/object.hpp:1163:5: warning: 'oz.msgpack::v1::object::with_zone::<unnamed>.msgpack::v2::object::msgpack::v1::object.msgpack::v1::object::via.msgpack::v1::object::union_type::i64' may be used uninitialized [-Wmaybe-uninitialized]
   1163 |     via = oz.via;
        |     ^~~
  

• /home/buildozer/aports/community/msgpack-cxx/src/msgpack-cxx-7.0.0/include/msgpack/v1/detail/cpp11_zone.hpp:197:15: warning: 'void free(void*)' called on pointer returned from a mismatched allocation function [-Wmismatched-new-delete]
    197 |         ::free(p);
        |         ~~~~~~^~~
  

• /home/buildozer/aports/community/msgpack-cxx/src/msgpack-cxx-7.0.0/include/msgpack/v1/pack.hpp:849:11: warning: comparison of unsigned expression in '< 0' is always false [-Wtype-limits]
    849 |     if (d < 0) {
        |         ~~^~~