修改bug

student/src/main/java/com/cooleshow/student/ui/work/HomeWorkDetailActivity.java

@@ -100,11 +100,11 @@ public class HomeWorkDetailActivity extends BaseMVPActivity<ActivityHomeworkDeta
 
             @Override
             public void delVideo(int pos) {
+                isChangeHomeWork = true;
                 if (mVideoWorkAdapter != null && pos < homeworkVideoData.size()) {
                     homeworkVideoData.remove(pos);
                     checkVideoList();
                     mVideoWorkAdapter.notifyDataSetChanged();
-                    isChangeHomeWork = true;
                 }
             }
         });