fix

@@ -197,6 +197,7 @@ public class GrassRewardsServiceImpl implements IGrassRewardsService {
         //首发奖励不允许修改
         if(req.getType() == 3){
             req.setMaxTime(1);
+            req.setRewardInterval(0);
         }
         if(req.getNum() == null){
             throw new PlatformException("reward num is null ", 405);