[LayaAirIDE 2.0]一个场景中加两个线形碰撞体出错

下个版本修复，    chaincollider的  方法 
 
override protected function getDef():* {
            if (!_shape) {
                _shape = new window.box2d.b2ChainShape();
                _setShape(false);
            }
            this.label = (this.label || "ChainCollider");
            return super.getDef();
        }
 
改成这样既可