fix 修复 委托、转办时nextTasks为空导致空指针的问题

ruoyi-modules/ruoyi-workflow/src/main/java/org/dromara/workflow/listener/WorkflowGlobalListener.java

@@ -15,7 +15,6 @@ import org.dromara.warm.flow.core.entity.Task;
 import org.dromara.warm.flow.core.listener.GlobalListener;
 import org.dromara.warm.flow.core.listener.ListenerVariable;
 import org.dromara.warm.flow.core.service.InsService;
-import org.dromara.warm.flow.orm.entity.FlowTask;
 import org.dromara.workflow.common.ConditionalOnEnable;
 import org.dromara.workflow.common.constant.FlowConstant;
 import org.dromara.workflow.common.enums.TaskStatusEnum;
@@ -126,7 +125,7 @@ public class WorkflowGlobalListener implements GlobalListener {
             if (StringUtils.isNotBlank(status)) {
                 flowProcessEventHandler.processHandler(definition.getFlowCode(), instance, status, params, false);
             }
-            if (task != null && nextTasks.size() == 1 && flwCommonService.applyNodeCode(definition.getId()).equals(nextTasks.get(0).getNodeCode())) {
+            if (task != null && CollUtil.isNotEmpty(nextTasks) && nextTasks.size() == 1 && flwCommonService.applyNodeCode(definition.getId()).equals(nextTasks.get(0).getNodeCode())) {
                 //如果为画线指定驳回 线条指定为驳回 驳回得节点为申请人节点 则修改流程状态为退回
                 flowProcessEventHandler.processHandler(definition.getFlowCode(), instance, BusinessStatusEnum.BACK.getStatus(), params, false);
                 //修改流程实例状态
@@ -185,7 +184,6 @@ public class WorkflowGlobalListener implements GlobalListener {
             return flowStatus;
         } else {
             Long instanceId = instance.getId();
-            List<FlowTask> flowTasks = flwTaskService.selectByInstId(instanceId);
             if (flwTaskService.isTaskEnd(instanceId)) {
                 String status = BusinessStatusEnum.FINISH.getStatus();
                 // 更新流程状态为已完成