bug处理

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

@@ -781,7 +781,7 @@ public class CourseScheduleServiceImpl extends ServiceImpl<CourseScheduleDao, Co
      */
     @Override
     public IPage<PracticeTeacherVo> teacherList(IPage<PracticeTeacherVo> page, PracticeTeacherSearch search) {
-        if (search.getScreen()) {
+        if (search.getScreen() != null && search.getScreen()) {
             search.setTeacherIdList(getTeacherId(30));
             return page.setRecords(baseMapper.teacherList(page, search));
         } else {