[llvm] [NFC] Fix dangling-else warning (PR #112817)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Given that omit braces in such cases is part of LLVM's style guide, I wonder whether it may be better to use `-Wno-dangling-else` when compiling gtest based code using GCC?

As Clang doesn't have this false positive, this warning will creep back in over time.

https://github.com/llvm/llvm-project/pull/112817