[Bug c++/81830] missing Wunused-local-typedef on a typedef of an unnamed enum or struct

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81830

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
This never seems to have worked correctly going as far back as GCC 4.1.0
(r104500) so it's not a regression.