修正广告接口的错误

src/controllers/ActivityController.ts

@@ -42,7 +42,7 @@ export default class ActivityController extends BaseController {
       throw new ZError(14, '操作太快了')
     }
     if (cfg.id == 90003 && record.count == 0) {
-      cfg = cfg.get(90004)
+      cfg = cfgMap.get(90004)
     }
     record.count += 1
     rest = cfg.frequency - record.count