Fix taxes graphical summary report (#587)

application/controllers/Reports.php

@@ -557,8 +557,8 @@ class Reports extends Secure_area
 			"title" => $this->lang->line('reports_taxes_summary_report'),
 			"subtitle" => date($this->config->item('dateformat'), strtotime($start_date)) . '-' . date($this->config->item('dateformat'), strtotime($end_date)),
 			"chart_type" => "reports/graphs/pie",
-			"labels_1" => rtrim($labels, ", "),
-			"series_data_1" => rtrim($series, ", "),
+			"labels_1" => $labels,
+			"series_data_1" => $series,
 			"summary_data_1" => $model->getSummaryData(array('start_date'=>$start_date, 'end_date'=>$end_date, 'sale_type'=>$sale_type))
 		);