bugfix: EK-0524: 结算后台无法下载PDF订单.

common/libs/export/BaseExport.php

@@ -841,7 +841,7 @@ ORDER;
             LoggerTool::debug(['result1' => 222]);
             $pdf->writeHTML($context);
             LoggerTool::debug(['result1' => 333]);
-            $result = $pdf->Output($realFile, 'F');
+            $result = $pdf->Output($realFile, 'I');
             LoggerTool::debug(['result' => $result]);
 
             $this->_updateFirst($realFile, 1);