message: should check whether there are all disabled items or not when refresh
diff: @@ -178,10 +178,6 @@ export function initMixin (BScroll) {
  this.refresh()
  - if (this.options.wheel) {
  - this._checkWheelAllDisabled()
  - }
  -
  if (!this.options.snap) {
  this.scrollTo(this.options.startX, this.options.startY)
  }
  @@ -475,6 +471,8 @@ export function initMixin (BScroll) {
  const wheel = this.options.wheel
  if (wheel) {
  this.items = this.scroller.children
  + // check whether there are all disable items or not when refresh
  + this._checkWheelAllDisabled()
  this.options.itemHeight = this.itemHeight = this.items.length ? this.scrollerHeight / this.items.length : 0
  if (this.selectedIndex === undefined) {
  this.selectedIndex = wheel.selectedIndex || 0
  