[clang] [Clang] Fix potential null pointer dereferences in Sema::AddInitializerToDecl (PR #94368)

[Tom Honermann via cfe-commits]

tahonermann wrote:

A new PR has been submitted to address this static analysis concern as @smanna12 is unavailable for the next week and I can't push to her fork. She coordinated with me to do this hand off. I'm now closing this issue on her behalf.

https://github.com/llvm/llvm-project/pull/106235

https://github.com/llvm/llvm-project/pull/94368