活动：七天乐每日优惠存储记录字段修改

shared/domain/activityField/dailyGiftsField.ts

@@ -28,6 +28,7 @@ export class DailyGiftItem {
         this.reward = data.reward;
         this.maxCount = data.maxCount;
         this.discount = data.discount;
+        this.buyCount = 0;
     }
 
     //消耗的资源
@@ -77,7 +78,7 @@ export class DailyGiftsData extends ActivityBase {
         for (let obj of this.list) {
             let index = data.findIndex(record => { return obj.dayIndex == record.dayIndex && obj.cellIndex == record.cellIndex })
             if (index != -1) {
-                obj.buyCount = data[index].buyCount;
+                obj.buyCount = data[index].buyCount ? data[index].buyCount : 0;
             } else {
                 obj.buyCount = 0;
             }