版本3.0 Lua多重继承BUG，BUG文件extern，方法class

Cocos2d-x
#1

1.lua一个类A继承于C++一个对象，如cc.Layer:create();
2.类A重写自己的构造函数A:ctor();
3.类B继承于类A，但是不会继承于类A的构造函数。因为在extern文件的class方法中，把类A当做了C++的对象，并且有一句cls.ctor = function() end，将ctor方法置为了空方法
应该判断一下，如果类A有构造函数，则不重写。或者类A应该属于Lua对象而不是C++对象

if superType == "function" or (super and super.__ctype == 1) then
        -- inherited from native C++ Object
        cls = {}

        if superType == "table" then
            -- copy fields from super
            for k,v in pairs(super) do cls = v end
            cls.__create = super.__create
            cls.super    = super
        else
            cls.__create = super
        end
        
        cls.ctor    = function() end
        cls.__cname = classname
        cls.__ctype = 1

        function cls.new(...)
            local instance = cls.__create(...)
            -- copy fields from class to native object
            for k,v in pairs(cls) do instance = v end
            instance.class = cls
            instance:ctor(...)
            return instance
        end

    else
        -- inherited from Lua Object
        if super then
            cls = clone(super)
            cls.super = super
        else
            cls = {ctor = function() end}
        end

        cls.__cname = classname
        cls.__ctype = 2 -- lua
        cls.__index = cls

        function cls.new(...)
            local instance = setmetatable({}, cls)
            instance.class = cls
            instance:ctor(...)
            return instance
        end
    end


```
#2

难道没有官网的人回复一下吗？