[Commits] [wesnoth/wesnoth] 9d2b0f: support container variables in [options] (#975)

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/wesnoth/wesnoth
  Commit: 9d2b0f64dcdd47fcc7b6254a03f85015597e0fb1
      https://github.com/wesnoth/wesnoth/commit/9d2b0f64dcdd47fcc7b6254a03f85015597e0fb1
  Author: gfgtdf <daniel.gfgtdf at gmail.com>
  Date:   2017-04-07 (Fri, 07 Apr 2017)

  Changed paths:
    M src/saved_game.cpp

  Log Message:
  -----------
  support container variables in [options] (#975)

options setting attributes in a container like
```
[options]
  [slider]
    id="container.attribute"
    ....
  [/slider]
[/options]
```
were broken in a previous refactor in 1.13.0. This commit should restore them.