[clang] [StaticAnalyzer] Make it a noop when initializing a field of empty record (PR #138594)

[Balazs Benics via cfe-commits]

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

Thank you for your contribution, and debugging the case.
Left a couple of comments inline.

https://github.com/llvm/llvm-project/pull/138594