update - 兼容旧版审批流程实例的同意驳回操作

workflow-engine-core/src/main/java/cn/axzo/workflow/core/listener/impl/InternalTaskEventListener.java

@@ -51,6 +51,9 @@ public class InternalTaskEventListener implements BpmnTaskEventListener {
 
         ExtAxHiTaskInst taskInst = hiTaskInstService.getByTaskId(delegateTask.getId(),
                 delegateTask.getProcessInstanceId());
+        if (Objects.isNull(taskInst)) {
+            return;
+        }
         if (Objects.nonNull(operationType)) {
             taskInst.setStatus(String.valueOf(operationType));
         } else {