[Bug c/118765] c23 tag matching broken for multiple redeclarations of unions and typedefs

[himehaieto at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118765

--- Comment #2 from Hime Haieto <himehaieto at gmail dot com> ---
Odd - I don't see any difference on trunk other than the addition of a helpful
note message (nice!).  However, I'm testing trunk via godbolt, so I don't know
if its trunk might be slightly older.