Description

Skips processing MT-32 debug messages in release builds because it can be excessive:

Also changes the logic slightly to let Loguru process the variable list directly, which fixes #3096.

Related issues

Fixes #3096, both in release and debug builds.

Manual testing

Tested MT-32 in release, debug, and sanitizer builds.

Checklist

I have:

• followed the project's contributing guidelines and code of conduct.
• performed a self-review of my code.
• commented on the particularly hard-to-understand areas of my code.
• split my work into well-defined, bisectable commits, and I named my commits well.
• applied the appropriate labels (bug, enhancement, refactoring, documentation, etc.)
• checked that all my commits can be built.
• confirmed that my code does not cause performance regressions (e.g., by running the Quake benchmark).
• added unit tests where applicable to prove the correctness of my code and to avoid future regressions.
• made corresponding changes to the documentation or the website according to the documentation guidelines.
• locally verified my website or documentation changes.