Node has virtual methods:

virtual void addChild(Node* child, int zorder, int tag);
virtual void addChild(Node* child, int zorder);
virtual void addChild(Node* child)

Sprite only override addChild(Node* child, int zorder, int tag),

OLD:¶

Sprite should also override all these three methods.

NEW¶

By using using Node::addChild, at the header of Sprite. Another two override functions will be not needed.

TO SUPPORT `NEW ` , Bindings-generator also needs to be updated.¶

It should not bind override methods, since cpp has the feature of polymorphism.
In this way, it will reduce some memory cost in JS/LUA vm.

The changes of Bindings-generator is here: https://github.com/cocos2d/bindings-generator/pull/62
The patch for Cocos2d-x is here: https://github.com/cocos2d/cocos2d-x/pull/4600

Our codes will be clearer after applying this patch. Cheers.