fix: Disabled constexpr mutex constructor to fix Windows build crashes.

[Bonfra04]

Some systems (like the github hosted runners) have recently changed default build system for windows builds and something breaks the entire system.

Seems like an issue in msvcp140!mtx_do_lock+0x9c is the culprit in both traces. After some quick research it seems like maybe the mutex isn't being initialized properly? Though admittedly my knowledge in c++ is limited so I could be mistaken.

As for why this is seems to be behaving differently when being built locally vs on github actions, I believe this may be able to explain it.

• Fixed mutex's constructor to be constexpr. #3824 #4000 #4339

  • Note: Programs that aren't following the documented restrictions on binary compatibility may encounter null dereferences in mutex machinery. You must follow this rule:

    When you mix binaries built by different supported versions of the toolset, the Redistributable version must be at least as new as the latest toolset used by any app component.

  • You can define _DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR as an escape hatch.

--- microsoft/STL changelog
--- MPV issue 892

The proposed fix explained in the issue above also works for this project

[Skyost]

Thanks. Can you please change the PR name to follow conventional commit conventions so that I can merge it please ? 🙂