BGE bug fix (continuation of previous bug fix):

- Forgot to make SCA_ISensor::UnregisterToManager() virtual to intercept active-inactive transition on collision sensor to clear colliders reference.
- Don't record collision on inactive sensor. 
  This situation occurs when an object with an inactive collision sensor collides with an object with an active collision sensor: the collision handler triggers both sensors.
  The result of this bug was pending references that eventually cause temporary memory leak (until the sensor is reactivated).

1 files changed, 2 insertions, 2 deletions

diff --git a/source/gameengine/GameLogic/SCA_ISensor.h b/source/gameengine/GameLogic/SCA_ISensor.h
index 0d65270dc7b..d1872009291 100644
--- a/source/gameengine/GameLogic/SCA_ISensor.h
+++ b/source/gameengine/GameLogic/SCA_ISensor.h
@@ -116,8 +116,8 @@ public:
 	/** set the level detection on or off */
 	void SetLevel(bool lvl);
 
-	void RegisterToManager();
-	void UnregisterToManager();
+	virtual void RegisterToManager();
+	virtual void UnregisterToManager();
 
 	virtual float GetNumber();