[Bug c/65120] [5 Regression] Wlogical-not-parentheses should not warn about double exclamation !!

[rguenth at gcc dot gnu.org]

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

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Oh, you can also workaround with

  if (b == !!a)