Weird but reproducible...

The game segfaults every time when you group/ungroup an army - but only if you loaded the game from the Game->Open menu.

How to reproduce:

- Create a new game or open a game from the LordsAWar welcome screen.
- Save the game.
- Group/ungroup your army => result as expected.
- Re-load the game from inside the game using the Game->Open menu.
- Select an army.
- Click the Ungroup button at the bottom of the screen => segmentation fault
- or: right click on army->Ungroup  => segmentation fault
- or: select one of the army members at the bottom of the screen in order to detach it from the group => segmentation fault
- but: right click on army->info, then click on "ungroup" on the info screen => NO segfault! Result as expected.

I can provide a saved game, but I tried with many and it seems to segfault every time.