修改部分bug

student/src/main/java/com/cooleshow/student/widgets/dialog/UploadHomeworkVideoDialog.java

@@ -212,6 +212,7 @@ public class UploadHomeworkVideoDialog extends Dialog implements View.OnClickLis
         }
 
         if (id == R.id.ll_upload_empty_view) {
+            isChangeHomeWork =true;
             if (mEventListener != null) {
                 mEventListener.goUpload();
             }