[Commits] [wesnoth/wesnoth] 905f1e: fix changed bahaviour of [filter]x="" [/filter]

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/wesnoth/wesnoth
  Commit: 905f1eb391550c0228d6f4068396813259a84bcd
      https://github.com/wesnoth/wesnoth/commit/905f1eb391550c0228d6f4068396813259a84bcd
  Author: gfgtdf <daniel.gfgtdf at gmail.com>
  Date:   2017-09-14 (Thu, 14 Sep 2017)

  Changed paths:
    M src/units/filter.cpp

  Log Message:
  -----------
   fix changed bahaviour of [filter]x="" [/filter]

in 1.12 [filter]x="" [/filter] filter machtes no units while in 1.13. it maches all units, this was likely caused by a6decea, this commit should also fix #1992 where this behaviour change caused an infinite [while] loop in an addons wml code.