[clang-tools-extra] [clang] [llvm] [clang] Fix false positive -Wmissing-field-initializer for anonymous unions (PR #70829)

[Mariya Podchishchaeva via cfe-commits]

Fznamznon wrote:

> I wonder if it would make sense to move the checking for this warning here, to the else case in line 725

Thanks for the suggestion, I gave it a try.

https://github.com/llvm/llvm-project/pull/70829