[Commits] [wesnoth/wesnoth] bb2d79: improve listbox::clear() performance.

[GitHub]

  Branch: refs/heads/gfgtdf-patch-1
  Home:   https://github.com/wesnoth/wesnoth
  Commit: bb2d79e5f033d4852680f27ab132b3d5241e0d78
      https://github.com/wesnoth/wesnoth/commit/bb2d79e5f033d4852680f27ab132b3d5241e0d78
  Author: gfgtdf <daniel.gfgtdf at gmail.com>
  Date:   2017-04-13 (Thu, 13 Apr 2017)

  Changed paths:
    M src/gui/widgets/listbox.cpp

  Log Message:
  -----------
  improve listbox::clear() performance.

previously listbox::clear() removed all elements one by one.
This was quite ineffective since due to the listbox always-one-element-selected behviour this required calculating which is the next element in this list in the current order. Which then again requires resorting of the whole list since due to the list content change (removal) the order cache is cleared.

this could also fix https://gna.org/bugs/?25504