fix

stmms-web/src/main/java/cn/com/qmth/stmms/admin/exam/InspectedController.java

@@ -332,7 +332,9 @@ public class InspectedController extends BaseExamController {
             obj.accumulate("success", false);
             obj.accumulate("message", "没有操作该评卷任务的权限");
         }
-        obj.accumulate("subjectCode", student.getSubjectCode());
+        if(student!=null) {
+        	obj.accumulate("subjectCode", student.getSubjectCode());
+        }
         return obj;
     }