stage2 llvm: correct handling of zero-bit types in unionFieldPtr

Pointers to zero-bit types are not zero-bit types so the function should
return something.
Closes #12716
7a8d9af4a9Veikka Tuominen committed on 9/2/2022, 2:57:10 PMparent4462d08
2 files changedLine totals unavailable