Mongolian troops cause battle crash upon charging

What steps will reproduce the problem?
1. Join battle featuring the Mongol troop tree as allies
2. Battlesizer at 300, primarily cavalry (Though all other battles w/o Mongols 
are fine)
3. Mongolian troops perform a charge on the enemy

What is the expected output? What do you see instead?
The battle should not be crashing as soon as the Mongol troops charge. 

What version of the product are you using? On what operating system?
SVN v.0.96beta
M&B Warband v.1.153

Windows 7 Home Premium 64bit, Intel i5-2450M, 6.00gb RAM

Please provide any additional information below.
Tested with 3-4 battles, with Golden Horde and Ilkhanate hordes. I join the 
battle on their side, usually against bandits, and as soon as they charge, the 
game crashes to desktop. Also tested twice where I fought the Mongols. No crash.

Original issue reported on code.google.com by deltah...@live.ca on 25 Nov 2012 at 11:42

lqy0628 / dev1257

Mongolian troops cause battle crash upon charging #140