Description of problem:
I've had a couple of core dumps with 8Kingdoms during normal gameplay lately,
but haven't been able to get a backtrace until now (see below)

Version-Release number of selected component (if applicable):
1.1.0-2.fc8.x86_64

How reproducible:
Always with the attached save file

Steps to Reproduce:
1. Start the game
2. Select 'Local game' and 'Load a saved game'
3. Select the attached 'autosave.xml' file and hit 'play'
4. In the game attributes screen, assign Role2, Role3, and Role4 to be computer
players with the default 'Normal' difficulty
5. Press 'play'
6. When the game starts it will be at the end of your turn.  Hit the 'end turn'
button and let the computer players take their turns.
  
Actual results:
The game starts showing the computer making its move, and crashes while the red
player is taking its turn.

Expected results:
The game continues on without crashing.

Additional info:

Core was generated by `8Kingdoms'.
Program terminated with signal 11, Segmentation fault.
#0  gui::TUnitMember::getModelDim (this=0x0, dim=0x7fffe8861198)
    at gui/model/guiUnit.cpp:347
347       *dim = inst->model_class->aabb.aabbDim.p2f;
(gdb) bt
#0  gui::TUnitMember::getModelDim (this=0x0, dim=0x7fffe8861198)
    at gui/model/guiUnit.cpp:347
#1  0x00000000004d160a in gui::TFormation::setStandardFormation (this=0x0, 
    p=<value optimized out>, d=<value optimized out>)
    at gui/model/UnitFormation.cpp:151
#2  0x00000000004c9324 in gui::TUnit::attack (this=0x3ff1c30, u=0x3cb7960, 
    b=0x2aaab5587e30, kills=0, loss=0, damage=0, akilled=25, dkilled=0, 
    bdestroyed=0, ah=0x41ee068, dh=0x41ee088) at gui/model/guiUnit.cpp:589
#3  0x0000000000489ced in gui::TGame::attackUnit (this=0x997290, rua=0x41ee020)
    at gui/contexts/Game.cpp:2637
#4  0x00000000004633d0 in gui::TGUI::pumpGameMessage (this=0x823a70)
    at gui/GUI.cpp:418
#5  0x0000000000490b46 in gui::TGame::workInput (this=0x997290, input=0x7ab224)
    at gui/contexts/Game.cpp:516
#6  0x000000000046e838 in gui::TScreen::processInput (this=0x3ff1c80)
    at gui/common/Screen.cpp:210
#7  0x000000000046ea9c in gui::TScreen::enterMainLoop (this=0x7ab1d0)
    at gui/common/Screen.cpp:139
#8  0x000000000046157c in gui::TGUI::main (this=<value optimized out>)
    at gui/GUI.cpp:199
#9  0x0000000000407f69 in main (argc=<value optimized out>, 
    argv=<value optimized out>) at 8Kingdoms.cpp:515
#10 0x0000003ff921e074 in __libc_start_main () from /lib64/libc.so.6
#11 0x00000000004068c9 in _start ()