[Bug c/65120] [gcc5] Wlogical-not-parentheses should not warn about double exclamation !!

[jirislaby at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65120

--- Comment #1 from Jiri Slaby <jirislaby at gmail dot com> ---
(In reply to Jiri Slaby from comment #0)
> Better than papering over this as
>   "if ((!aa) = b)"

Pardon me, it should write:
  "if ((!!aa) = b)"