[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 #12 from Chen Gang <gang.chen.5i5j at gmail dot com> ---
The patch passes "make check". I guess, it should be OK.