BGE cleanup: KX_GameObject::GetParent() no longer increases the object's refcount.

I'm not sure why this function ever increased the object's refcount. Any
place in the code that calls KX_GameObject::GetParent() has to turn
around and call parent->Release(). Forgetting to call Release() was a
common cause of memory leaks (in fact, KX_SteeringActuator was probably
leaking). If the refcount needs to be increased, the calling code can
handle calling AddRef().

source/gameengine/Ketsji/KX_ConstraintActuator.cpp

@@ -342,7 +342,6 @@ bool KX_ConstraintActuator::Update(double curtime, bool frame)
 					KX_GameObject *parent = obj->GetParent();
 					if (parent) {
 						spc = parent->GetPhysicsController();
-						parent->Release();
 					}
 				}
 				KX_RayCast::Callback<KX_ConstraintActuator> callback(this,dynamic_cast<PHY_IPhysicsController*>(spc));

source/gameengine/Ketsji/KX_GameObject.cpp

@@ -306,9 +306,6 @@ KX_GameObject* KX_GameObject::GetParent()
 		if (node)
 			result = (KX_GameObject*)node->GetSGClientObject();
 	}
-	
-	if (result)
-		result->AddRef();
 
 	return result;
 	
@@ -2113,7 +2110,6 @@ PyObject *KX_GameObject::pyattr_get_parent(void *self_v, const KX_PYATTRIBUTE_DE
 	KX_GameObject* self = static_cast<KX_GameObject*>(self_v);
 	KX_GameObject* parent = self->GetParent();
 	if (parent) {
-		parent->Release(); /* self->GetParent() AddRef's */
 		return parent->GetProxy();
 	}
 	Py_RETURN_NONE;

source/gameengine/Ketsji/KX_RaySensor.cpp

@@ -265,9 +265,6 @@ bool KX_RaySensor::Evaluate()
 	if (!spc && parent)
 		spc = parent->GetPhysicsController();
 	
-	if (parent)
-		parent->Release();
-	
 
 	PHY_IPhysicsEnvironment* physics_environment = this->m_scene->GetPhysicsEnvironment();
 	

source/gameengine/Ketsji/KX_Scene.cpp

@@ -575,9 +575,6 @@ KX_GameObject* KX_Scene::AddNodeReplicaObject(class SG_IObject* node, class CVal
 		newctrl->SetNewClientInfo(newobj->getClientInfo());
 		newobj->SetPhysicsController(newctrl, newobj->IsDynamic());
 		newctrl->PostProcessReplica(motionstate, parentctrl);
-
-		if (parent)
-			parent->Release();
 	}
 
 	return newobj;
@@ -758,8 +755,6 @@ void KX_Scene::DupliGroupRecurse(CValue* obj, int level)
 		KX_GameObject *parent = gameobj->GetParent();
 		if (parent != NULL)
 		{
-			parent->Release(); // GetParent() increased the refcount
-
 			// this object is not a top parent. Either it is the child of another
 			// object in the group and it will be added automatically when the parent
 			// is added. Or it is the child of an object outside the group and the group

source/gameengine/Ketsji/KX_TouchSensor.cpp

@@ -208,10 +208,6 @@ bool	KX_TouchSensor::BroadPhaseSensorFilterCollision(void*obj1,void*obj2)
 	KX_ClientObjectInfo *my_client_info = static_cast<KX_ClientObjectInfo*>(m_physCtrl->GetNewClientInfo());
 	KX_GameObject* otherobj = ( client_info ? client_info->m_gameobject : NULL);
 
-	// first, decrement refcount as GetParent() increases it
-	if (myparent)
-		myparent->Release();
-
 	// we can only check on persistent characteristic: m_link and m_suspended are not
 	// good candidate because they are transient. That must be handled at another level
 	if (!otherobj ||

source/gameengine/Ketsji/KX_TrackToActuator.cpp

@@ -79,8 +79,6 @@ KX_TrackToActuator::KX_TrackToActuator(SCA_IObject *gameobj,
 				m_parentlocalmat = m_parentobj->GetSGNode()->GetLocalOrientation();
 				// use registration mechanism rather than AddRef, it creates zombie objects
 				m_parentobj->RegisterActuator(this);
-				// GetParent did AddRef, undo here
-				m_parentobj->Release();
 			}
 		}
 	}

source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp

@@ -3200,8 +3200,6 @@ void CcdPhysicsEnvironment::ConvertObject(KX_GameObject *gameobj, RAS_MeshObject
 	{
 		delete motionstate;
 		shapeInfo->Release();
-		if (parent)
-			parent->Release();
 		return;
 	}
 
@@ -3254,8 +3252,6 @@ void CcdPhysicsEnvironment::ConvertObject(KX_GameObject *gameobj, RAS_MeshObject
 			shapeInfo->Release();
 			// delete motionstate as it's not used
 			delete motionstate;
-			if (parent)
-				parent->Release();
 			return;
 		}
 
@@ -3432,7 +3428,4 @@ void CcdPhysicsEnvironment::ConvertObject(KX_GameObject *gameobj, RAS_MeshObject
 		}
 	}
 #endif
-
-	if (parent)
-		parent->Release();
 }

source/gameengine/Rasterizer/RAS_OpenGLRasterizer/RAS_OpenGLRasterizer.cpp

@@ -1375,8 +1375,6 @@ void RAS_OpenGLRasterizer::applyTransform(double* oglmatrix,int objectdrawmode )
 			KX_GameObject *parent = gameobj->GetParent();
 			if (!physics_controller && parent)
 				physics_controller = parent->GetPhysicsController();
-			if (parent)
-				parent->Release();
 
 			KX_RayCast::Callback<RAS_OpenGLRasterizer> callback(this, physics_controller, oglmatrix);
 			if (!KX_RayCast::RayTest(physics_environment, frompoint, topoint, callback))