[LayaAir 2.0]Graphics.drawLines设置x轴y轴的初始位置的参数失效

(function()

{

    var Sprite = Laya.Sprite;

    var Stage  = Laya.Stage;

    var WebGL  = Laya.WebGL;

    var sp;

    (function()

    {

        //初始化舞台

        Laya.init(500, 300, WebGL);

        drawSomething();

    })();

    function drawSomething()

    {

        sp = new Sprite();

        Laya.stage.addChild(sp);

        //画折线       

        sp.graphics.drawLines(100, 100, [0, 0, 39, 50, 78, 0, 120, 50],  "#ff0000", 5);

    }

})();