[Commits] [wesnoth/wesnoth] f20c40: Allow wesnoth.select_unit() to deselect the unit

[GitHub]

  Branch: refs/heads/deselect_unit
  Home:   https://github.com/wesnoth/wesnoth
  Commit: f20c4067e3afb1922151f24ee6a13bff1acb49ac
      https://github.com/wesnoth/wesnoth/commit/f20c4067e3afb1922151f24ee6a13bff1acb49ac
  Author: Celtic Minstrel <CelticMinstrel at users.noreply.github.com>
  Date:   2017-03-17 (Fri, 17 Mar 2017)

  Changed paths:
    M src/scripting/game_lua_kernel.cpp

  Log Message:
  -----------
  Allow wesnoth.select_unit() to deselect the unit

Since @vultraz recently decided to remove this feature from wesnoth.deselect_hex.