[Bug sanitizer/80797] -fsanitize=null doesn't instrument &s->x

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80797

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Patch posted <https://gcc.gnu.org/ml/gcc-patches/2017-05/msg01387.html>.