message: cancel math.round when touchstart
diff: @@ -387,7 +387,7 @@ export class BScroll extends EventEmitter {
  if (this.options.useTransition && this.isInTransition) {
  this.isInTransition = false;
  let pos = this.getComputedPosition();
  - this._translate(Math.round(pos.x), Math.round(pos.y));
  + this._translate(pos.x, pos.y);
  if (this.options.wheel) {
  this.target = this.items[Math.round(-pos.y / this.itemHeight)];
  } else {
  