drilldown.js in highcharts-rails-4.1.7

- old
+ new

@@ -640,10 +640,14 @@
 
 		if (point.drilldown) {
 			
 			// Add the click event to the point 
 			H.addEvent(point, 'click', function () {
-				point.doDrilldown();
+				if (series.xAxis && series.chart.options.drilldown.allowPointDrilldown === false) {
+					series.xAxis.drilldownCategory(x);
+				} else {
+					point.doDrilldown();
+				}
 			});
 			/*wrap(point, 'importEvents', function (proceed) { // wrapping importEvents makes point.click event work
 				if (!this.hasImportedEvents) {
 					proceed.call(this);
 					H.addEvent(this, 'click', function () {