[Bug fortran/64244] [4.8/4.9/5 Regression] ICE at class.c:236 when using non_overridable

[ondrej.certik at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64244

--- Comment #9 from Ondřej Čertík <ondrej.certik at gmail dot com> ---
Janus, thanks a lot for fixing this! Yes, it's part of a large code base. I'll
try the trunk soon.