[Bug libstdc++/65928] std::find_if compilation errors

[david.claessens at tomra dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65928

--- Comment #6 from david.claessens at tomra dot com ---
Apparently it is not (only) included from string.
Changing to a char array and removing that include doesn't change anything.