[Bug c++/70767] std::numeric_limits::digits is wrong unless --std=c++11 used

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70767

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#559
It has status CD1, I don't remember if that means it applies retroactively or
not.
(by the way, the 4.8 branch is not maintained anymore)