[clang] [clang][Sema] Guard polymorphic check in TransformCXXTypeidExpr for incomplete record types (PR #180442)

[Erich Keane via cfe-commits]

https://github.com/erichkeane requested changes to this pull request.

I'm convinced this is the wrong patch.  The examples (an in complete type in a typeid) is ill-formed: 
https://eel.is/c++draft/expr.typeid#2

https://github.com/llvm/llvm-project/pull/180442