[clang] [Clang] Fixed getPredefinedExprDecl Assert When No Lambda Scope (PR #221713)

[Shengxin Pei via cfe-commits]

https://github.com/TPPPP72 requested changes to this pull request.

Your PR removed the assertion. Please provide a clear and widely accepted reason.

https://github.com/llvm/llvm-project/pull/221713