Merge pull request #1297 in BA/design from ~MANGO/m_design:release/9.0 to release/9.0

* commit '3672488555b5d1bb7897e5befcd86c14be0c6836':
  甘特图通过滑轮设置无法保存

designer_chart/src/com/fr/plugin/chart/structure/desinger/style/VanChartStructureSeriesPane.java

@@ -135,8 +135,10 @@ public class VanChartStructureSeriesPane extends VanChartAbstractPlotSeriesPane
     protected void updateCondition(ConditionAttr defaultAttr){
         if(nodeStylePane != null){
             AttrNode attrNode =defaultAttr.getExisted(AttrNode.class);
+            if (attrNode != null) {
                 defaultAttr.remove(attrNode);
                 defaultAttr.addDataSeriesCondition(nodeStylePane.updateBean());
             }
         }
     }
+}