easing 缓速动画的bug

[luosixiang (AIQ)]

let moveBy = cc.moveBy(0.3, cc.p(-1334, 0));
runAction 结束后 node.x，node.y 被修改为 -1334，0
添加easing： moveBy.easing(cc.easeInOut(2));
runAction 后面加个callFunc动画， node.x， node.y 还是0.