[Bug c/47931] missing -Waddress warning for comparison with NULL

[clyon at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47931

--- Comment #9 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Indeed, I can now see it was fixed between r244372 and r244391, sorry for the
noise (there was a delay in my validations).