[clang] Fix buildbot failure. (PR #86741)

[Zahira Ammarguellat via cfe-commits]

zahiraam wrote:

> Would you mind merging this PR into the LLVM source tree if nothing is blocking you?
> 
> If something is blocking you, I am happy to revert your original patch on your behalf (along with the `(void)` fix).

I thought the issue was fixed with the (void) addition! If not, I will merge this PR immediately. 

https://github.com/llvm/llvm-project/pull/86741