SCR_DamageArea::OnAreaExit does not seem to get called, which leaks the callbacks registered in SCR_DamageArea::OnAreaEntered when exiting the area.

Steps to reproduce (in principle can be verified with breakpoints, but this one is much funnier):

1. Start Game Master - Kolguyev

2. Spawn near poison lakes (e.g. Devil's Rift south of Pik Pobedy)

3. Place a non-watertight vehicle (e.g. M151A2) outside the damage area

4. Shortly enter one of the damage areas and exit

5. Entering the vehicle will start the poison effect again, confirming the compartment access handlers got leaked