[Bug libstdc++/58403] __normal_iterator triggers odr-use

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58403

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Changing this would be of course trivial. I'd like to see one of those
linker-errors though.