[Commits] [wesnoth/wesnoth] fa4a17: Attempted build fix with Boost < 1.57

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/wesnoth/wesnoth
  Commit: fa4a17d587e258a398a4a421f97c7be96a2fba57
      https://github.com/wesnoth/wesnoth/commit/fa4a17d587e258a398a4a421f97c7be96a2fba57
  Author: gfgtdf <daniel.gfgtdf at gmail.com>
  Date:   2017-06-02 (Fri, 02 Jun 2017)

  Changed paths:
    M src/serialization/string_view.hpp

  Log Message:
  -----------
  Attempted build fix with Boost < 1.57