[clang] [clang-format] Fix a bug in annotating function declaration names (PR #76206)

[Matt Mundell via cfe-commits]

mattmundell wrote:

> `clang-format` doesn't know what are types, except for the keywords. So there is no way to decide if this is a function declaration without naming the parameters, or a variable declaration with a constructor call.

This is C so I guess it can only be a function declaration. Anyway, it's minor to work around, thanks again.

https://github.com/llvm/llvm-project/pull/76206