[clang-tools-extra] [NFC] Fix potential nullptr dereference. (PR #138283)

[Nicolas van Kempen via cfe-commits]

nicovank wrote:

> But it might not be a `UnaryOperator`, no?

`unaryOperator(...).bind("op")` implies `op` will always be a `UnaryOperator`.

https://github.com/llvm/llvm-project/pull/138283