[wesnoth-commits] [wesnoth/wesnoth] 8af1d6: add an assertion

[gfgtdf]

  Branch: refs/heads/master
  Home:   https://github.com/wesnoth/wesnoth
  Commit: 8af1d6173ebd2465d6bfb4a707abd13c22e04734
      https://github.com/wesnoth/wesnoth/commit/8af1d6173ebd2465d6bfb4a707abd13c22e04734
  Author: gfgtdf <daniel.gfgtdf at gmail.com>
  Date:   2020-02-28 (Fri, 28 Feb 2020)

  Changed paths:
    M src/display.cpp

  Log Message:
  -----------
  add an assertion

to debug crash in editor https://github.com/wesnoth/wesnoth/issues/4755