[clang] [clang][AST] fix dereference on class/struct layouts check. (PR #83686)

[David CARLIER via cfe-commits]

devnexen wrote:

it seems [there is an ongoing fix](https://github.com/llvm/llvm-project/pull/83688), could you possibly try so we can just close this one.

https://github.com/llvm/llvm-project/pull/83686