[clang] [clang][Sema] Fix crash on designated initializer of union member in subobject (PR #167171)

[Naveen Seth Hanig via cfe-commits]

naveen-seth wrote:

Hi sorry for not getting to this.
I will try to reopen a PR for this when I get the time, but will close this for now in case someone else wants to work on it.

https://github.com/llvm/llvm-project/pull/167171