fix:旧数据兼容

cooleshow-user/user-biz/src/main/java/com/yonge/cooleshow/biz/dal/service/impl/VideoLessonGroupServiceImpl.java

@@ -716,6 +716,9 @@ public class VideoLessonGroupServiceImpl extends ServiceImpl<VideoLessonGroupDao
                                                                                                 VideoLessonGroupDetailDto.class);
             g.setVideoList(videoLessonGroupDetailDtoList);
 
+            if (CollectionUtils.isEmpty(videoLessonGroupDetailDtoList)) {
+                continue;
+            }
 
             List<CourseRelationMusicAlbum> recordInfos = videoLessonGroupDetailDtoList.stream()
                                   .filter(x -> CollectionUtils.isNotEmpty(x.getCourseRelationMusicAlbumList()))