Pathfinder exploit patch.

If the enemy is not found, he not taken into account in pathfinder calculation.
Aliens can to open door and to kill standing behind door soldier.
If the enemy is not found, he not taken into account in pathfinder calculation.
Aliens can to open door and to kill standing behind door soldier.
Soldiers may to see, who kill them.
Merge pull request #342 from redv/pathfider_patch

Pathfinder exploit patch v2