[Bug libstdc++/87641] std::valarray::sum() fails for types where T() is not a neutral element for addition

[frederic.jardon at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87641

--- Comment #8 from Frederic Jardon <frederic.jardon at gmail dot com> ---
Thank you for the fast response :)