[Bug c/55976] -Werror=return-type should error on returning a value from a void function

[dave.pagan at oracle dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55976

--- Comment #6 from Dave Pagan <dave.pagan at oracle dot com> ---
Helpful update, Jonathan - did you want to follow up on this bug then? Or
should I go ahead based on your new information?