[clang-tools-extra] [clang-tidy] [NFC] Potential dereference of nullptr. (PR #143145)

[Carlos Galvez via cfe-commits]

https://github.com/carlosgalvezp approved this pull request.

I think this is the correct thing to do. It's a programming error if these pointers are null, and so assertions are the correct tool for this.

Other checks do `if (const auto* Found = ...)`, but that's not correct, since it silences programming errors.

https://github.com/llvm/llvm-project/pull/143145