fix 折扣率显示

helper/buy_first.php

@@ -108,13 +108,13 @@ class buy_first
 
     private function discount_desc($rate,$amount)
     {
-        if($rate > 0) {
+        if ($rate == 100) {
+            return "";
+        }
+        elseif ($rate > 0) {
             $rate = $rate / 10;
             return "相比官旗店，折扣率为{$rate}折，节省{$amount}元";
         }
-        elseif ($rate == 100) {
-            return "";
-        }
         else {
             return "相比官旗店，折扣率为全抵，节省{$amount}元";
         }