[Commits] [wesnoth/wesnoth] 0db553: Restore bounded_add()

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/wesnoth/wesnoth
  Commit: 0db553ef36bc7d4d1ec10a7521a2c061d9234805
      https://github.com/wesnoth/wesnoth/commit/0db553ef36bc7d4d1ec10a7521a2c061d9234805
  Author: Jyrki Vesterinen <sandgtx at gmail.com>
  Date:   2018-01-21 (Sun, 21 Jan 2018)

  Changed paths:
    M src/terrain/terrain.hpp
    M src/tod_manager.cpp
    M src/utils/math.hpp

  Log Message:
  -----------
  Restore bounded_add()

Partial revert of commit ecbb15e1c6d1106ff2f8e540c584523481426c04.

Replacing bounded_add() with std::clamp() in these contexts disables
time-of-day bonuses, since ToD bonuses (the base value in these functions)
are almost always outside the range set in terrain properties.