drilldown.js in highcharts-rails-5.0.3

- old
+ new

@@ -1,7 +1,7 @@
 /**
- * @license Highcharts JS v5.0.0 (2016-09-29)
+ * @license Highcharts JS v5.0.3 (2016-11-18)
  * Highcharts Drilldown module
  * 
  * Author: Torstein Honsi
  * License: www.highcharts.com/license
  *
@@ -192,10 +192,11 @@
                 seriesOptions: oldSeries.options,
                 levelSeriesOptions: levelSeriesOptions,
                 levelSeries: levelSeries,
                 shapeArgs: point.shapeArgs,
                 bBox: point.graphic ? point.graphic.getBBox() : {}, // no graphic in line series with markers disabled
+                color: point.isNull ? new H.Color(color).setOpacity(0).get() : color,
                 lowerSeriesOptions: ddOptions,
                 pointOptions: oldSeries.options.data[pointIndex],
                 pointIndex: pointIndex,
                 oldExtremes: {
                     xMin: xAxis && xAxis.userMin,
@@ -640,11 +641,11 @@
                 var i,
                     xData = series.xData,
                     points = series.points;
 
                 for (i = 0; i < xData.length; i++) {
-                    if (xData[i] === x && series.options.data[i].drilldown) {
+                    if (xData[i] === x && series.options.data[i] && series.options.data[i].drilldown) {
                         ret.push(points ? points[i] : true);
                         break;
                     }
                 }
             });
@@ -715,10 +716,10 @@
             if (point.drilldown) {
 
                 // Add the click event to the point 
                 H.addEvent(point, 'click', function(e) {
                     if (series.xAxis && series.chart.options.drilldown.allowPointDrilldown === false) {
-                        series.xAxis.drilldownCategory(x, e);
+                        series.xAxis.drilldownCategory(point.x, e); // #5822, x changed
                     } else {
                         point.doDrilldown(undefined, undefined, e);
                     }
                 });
                 /*wrap(point, 'importEvents', function (proceed) { // wrapping importEvents makes point.click event work