Assignments: Fix save feedback

main/work/view.php

@@ -111,11 +111,13 @@ if (($isDrhOfCourse || $allowEdition || $isDrhOfSession || user_is_author($id))
                 );
 
                 if ($allowEdition) {
+                    $qualification = isset($_POST['qualification']) ? api_float_val($_POST['qualification']) : 0;
+
                     $work_table = Database::get_course_table(TABLE_STUDENT_PUBLICATION);
                     $sql = "UPDATE $work_table
                             SET
                                 qualificator_id = '".api_get_user_id()."',
-                                qualification = '".api_float_val($_POST['qualification'])."',
+                                qualification = '$qualification',
                                 date_of_qualification = '".api_get_utc_datetime()."'
                             WHERE c_id = ".$courseInfo['real_id']." AND id = $id";
                     Database::query($sql);