fix：“优化优惠码查询接口”

src/main/java/com/szwl/controller/TPromoCodeController.java

@@ -614,7 +614,11 @@ public class TPromoCodeController {
                 return null;
             }
             Float discount = promoCode.getDiscount();
-            return JsonMessage.success(discount);
+            String type = promoCode.getType();
+            JSONObject kindData = new JSONObject();
+            kindData.put("type", type.equals("1") ? type : "0");
+            kindData.put("discount", discount);
+            return JsonMessage.success(kindData.toString());
         }else{
             return null;
         }