[BUG]Chart.elements.Rectangle.getArea() is NaN when Horizontal Bar Chart case

[nicenicenicerice]

ver: 2.6.0
bug: Chart.elements.Rectangle.getArea() is NaN when Horizontal Bar Chart case
code:

getArea: function() {
  var vm = this._view;
  return vm.width * Math.abs(vm.y - vm.base);
} 

ref: Chart.controllers.bar.updateElementGeometry: function(rectangle, index, reset)
desc:
must consider Horizontal case

[nicenicenicerice]

You can refer my fixed code. thanks~

getArea: function() {
      var vm = this._view;
      return isVertical(this)
      ? vm.width  * Math.abs(vm.y - vm.base)
      : vm.height * Math.abs(vm.x - vm.base);
}