[Bug c++/62153] warn for bool expression compared with integer different from 0/1

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62153

--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This should be enabled in GCC bootstrap:

https://gcc.gnu.org/ml/gcc-patches/2014-08/msg01555.html