[clang] [clang] Fix unexpected warnings after a01307a (PR #75591)

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mikaelholmen wrote:

> > Ok, ideally this should be reviewed by someone who knows the code but it LGTM.
> 
> I know, but a lot of folks are now on vacation already. The change is not complicated, so I'll probably wait till green pre-commit, then leave it for post-commit review to resolve the issue.

Yeah, sounds good. Thanks!


https://github.com/llvm/llvm-project/pull/75591