EventDispatcher类中clear()函数

Cocos2d-x
#1

如下引擎源码：
在清空_sceneGraphListeners和_fixedListeners容器时，应该先delete容器中元素在clear容器。 不知道算不算内存泄漏？？？？？？
请官方给与指点 看是不是内存泄漏
void EventDispatcher::EventListenerVector::clearSceneGraphListeners()
{
if (_sceneGraphListeners)
{
_sceneGraphListeners->clear();
delete _sceneGraphListeners;
_sceneGraphListeners = nullptr;
}
}

void EventDispatcher::EventListenerVector::clearFixedListeners()
{
if (_fixedListeners)
{
_fixedListeners->clear();
delete _fixedListeners;
_fixedListeners = nullptr;
}
}

void EventDispatcher::EventListenerVector::clear()
{
clearSceneGraphListeners();
clearFixedListeners();
}

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