修复缴费金额为0显示的bug

application/em/model/EmInvoice.php

@@ -51,7 +51,8 @@ class EmInvoice extends Base
             if($item['payment_balance'] == 0){
                 $item['paid_amount'] = $item['payment_amount'] ;
             } else {
-                $item['paid_amount'] = round($item['payment_amount'] - $item['payment_balance'],3);
+                $temp = $item['payment_amount'] - $item['payment_balance'];
+                $item['paid_amount'] = $temp == 0 ? $temp : round($item['payment_amount'] - $item['payment_balance'],3);
             }
 
             if($item['settle_balance'] == 0){