[LayaAir 2.0]2.0字体比较小的时候，某些字显示不全

package {

    import laya.webgl.WebGL;

    import laya.display.Text;

    public class LayaSample {

        

        public function LayaSample() {

            //初始化引擎

            Laya.init(480, 640,WebGL);

            Laya.stage.bgColor = "#FFFF33";

            

            var txt:Text = new Text();

            //给文本的text属性赋值

            txt.text = "gggggqqqqqqqyyyyyyyvvvv";

            

            txt.align = "center";

            txt.fontSize = 15;

            txt.font = "Microsoft YaHei";

            txt.color = "#ff0000";

            txt.leading = 5;

            

            txt.x = (Laya.stage.width - txt.textWidth) / 2;

            txt.y = (Laya.stage.height - txt.textHeight) / 2;

            

            Laya.stage.addChild(txt);

        }		

    }

}