BGE: Fix T30179 action actuator not stoped when state changed.

The function SCA_IActuator::DecLink is now under virtual : in some case the actuator have to know when is useless.

source/gameengine/Converter/BL_ActionActuator.cpp

@@ -336,6 +336,17 @@ bool BL_ActionActuator::Update(double curtime, bool frame)
 	return m_flag & ACT_FLAG_ACTIVE;
 }
 
+void BL_ActionActuator::DecLink()
+{
+	SCA_IActuator::DecLink();
+	/* In this case no controllers use this action actuator,
+	   and it should stop its action. */
+	if (m_links == 0) {
+		KX_GameObject *obj = (KX_GameObject *)GetParent();
+		obj->StopAction(m_layer);
+	}
+}
+
 #ifdef WITH_PYTHON
 
 /* ------------------------------------------------------------------------- */

source/gameengine/Converter/BL_ActionActuator.h

@@ -69,6 +69,8 @@ public:
 	bAction*	GetAction() { return m_action; }
 	void		SetAction(bAction* act) { m_action= act; }
 
+	virtual void DecLink();
+
 #ifdef WITH_PYTHON
 
 	KX_PYMETHOD_O(BL_ActionActuator,GetChannel)

source/gameengine/GameLogic/SCA_IActuator.h

@@ -156,7 +156,7 @@ public:
 
 	void ClrLink() { m_links=0; }
 	void IncLink() { m_links++; }
-	void DecLink();
+	virtual void DecLink();
 	bool IsNoLink() const { return !m_links; }
 	bool IsType(KX_ACTUATOR_TYPE type) { return m_type == type; }