[Bug middle-end/63510] Wrong line number in Wstrict-overflow message

[gang.chen.5i5j at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63510

--- Comment #8 from Chen Gang <gang.chen.5i5j at gmail dot com> ---
For the latest gcc, it still has this issue, I shall try to fix it during these
days (hope can fix it within this month).

Thanks.