Fix variable declaration

[Smarre]

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What does this PR aim to accomplish?:

Fixes build on at least current OpenSUSE Tumbleweed.

How does this PR accomplish the above?:

By fixing certain wrongly declared functions and variables to be declared correctly.

Link documentation PRs if any are needed to support this PR:

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[DL6ER]

Thanks!

[DL6ER]

@Smarre could you sign your commits?

See https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits

[Smarre]

@Smarre could you sign your commits?

Sorry, looks like I forgot to push the signed versions.