fix 随机练习

zhongzheng-system/src/main/java/com/zhongzheng/modules/user/service/impl/UserStudyRecordServiceImpl.java

@@ -340,6 +340,7 @@ public class UserStudyRecordServiceImpl extends ServiceImpl<UserStudyRecordMappe
             add.setStartTime(DateUtils.getNowTime().longValue() - add.getStudyDuration().longValue());
         }else{
             add.setStartTime(DateUtils.getNowTime().longValue());
+            add.setStudyDuration(0L);
         }
         add.setEndTime(DateUtils.getNowTime());
         if(Validator.isNotEmpty(first)&&Validator.isNotEmpty(first.getFirstStartTime())){