解决作废之后，调课顶课标识还在的问题

src/main/java/com/xjrsoft/module/schedule/service/impl/WfCourseAdjustServiceImpl.java

@@ -57,6 +57,9 @@ public class WfCourseAdjustServiceImpl extends MPJBaseServiceImpl<WfCourseAdjust
             bakMap.put(courseTableBak.getId(), courseTableBak);
         }
         List<Long> courseIds = bakList.stream().map(CourseTableBak::getId).collect(Collectors.toList());
+        if(courseIds.isEmpty()){
+            return true;
+        }
         List<CourseTable> list = courseTableService.listByIds(courseIds);
         if(CourseAdjustTypeEnum.courseSubstitute.getCode().equals(courseAdjust.getAdjustType())){//顶课
             for (CourseTable courseTable : list) {