Fix Warning C4098: void returns value.

[Rot127]

Your checklist for this pull request

• [ ] I've documented or updated the documentation of every API function and struct this PR changes.
• [ ] I've added tests that prove my fix is effective or that my feature works (if possible)

Detailed description

Fixes some warnings from MSVC about void functions returning values.

Test plan

All green

Closing issues

...

[Rot127]

Do it tomorrow. Locally it still fails for me.

[XVilka]

@kabeor could you please merge this one?