fix bug;

molilian.core/Plus/Alimama/coupon.cs

@@ -21,7 +21,7 @@ namespace molilian.core
 
             if (result.success)
             {
-                if (result.couponAmount == 0)
+                if (data.couponAmount == 0)
                 {
                     result.success = false;
                     result.message = "没有优惠券";