Unconscious units don't die after loading a saved game

WFTO v1.3.1f5

As far as I can tell, units defeated in a battle are unconscious for one minute. Then they are dead for two more minutes and disappear after that. When a saved game with unconscious units is loaded, these units remain unconscious forever (okay, maybe not forever, I waited only 10 minutes).

Steps to reproduce:

1. Use any map and make sure there are some unconscious units (empire units or player's minions)
2. Save the game and reload
3. Observe unconscious units - they will not die