jquery.flot.orderBars.js.patch

--- jquery.flot.orderBars.js.new	2018-08-17 17:04:59.787127715 +0200
+++ jquery.flot.orderBars.js.new	2018-08-17 17:09:13.291107457 +0200
@@ -76,6 +76,11 @@
         function getAxeMinMaxValues(series,AxeIdx){
             var minMaxValues = new Array();
             for(var i = 0; i < series.length; i++){
+		if (typeof series[i].data[0] != "number") {
+		    minMaxValues[0] = 0;
+		    minMaxValues[1] = series.length;
+		    return minMaxValues;
+		}
                 minMaxValues[0] = series[i].data[0][AxeIdx];
                 minMaxValues[1] = series[i].data[series[i].data.length - 1][AxeIdx];
             }