fix duplicated tooltip with pie chart

Author: BenoitLeveque

jquery.highchartTable.js

@@ -405,6 +405,9 @@
                 return '<b>'+ this.series.name +'</b><br/>'+  Highcharts.dateFormat('%e. %b', this.x) +' : '+ this.y;
               } else {
                 var xValue = typeof xValues[this.point.x] != 'undefined' ? xValues[this.point.x] : this.point.x;
+                if (globalGraphType === 'pie') {
+                  return '<strong>' + this.series.name + '</strong><br />' + xValue + ' : '  + this.point.y;
+                }
                 return '<strong>' + this.series.name + '</strong><br />' + xValue + ' : '  + this.point.name;
               }
             }