fix 修复 判断条件写反问题

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

@@ -74,7 +74,7 @@ public class WorkflowGlobalListener implements GlobalListener {
         String ext = listenerVariable.getNode().getExt();
         if (StringUtils.isNotBlank(ext)) {
             Map<String, Object> variable = listenerVariable.getVariable();
-            if (CollUtil.isNotEmpty(variable)) {
+            if (CollUtil.isEmpty(variable)) {
                 variable = new HashMap<>();
             }
             NodeExtVo nodeExt = nodeExtService.parseNodeExt(ext, variable);