REPORT-40606 【回归测试】表单模板如果未选择组件进行多次拖动，再切换模板就不行了，报错

designer-form/src/main/java/com/fr/design/mainframe/FormDesigner.java

@@ -619,8 +619,9 @@ public class FormDesigner extends TargetComponent<Form> implements TreeSelection
         if (paraComponent != null && paraComponent.acceptType(XWParameterLayout.class)) {
             return true;
         } else {
-            if (this.getSelectionModel().getSelection().getSelectedCreator().getParent() != null
+            XCreator creator = this.getSelectionModel().getSelection().getSelectedCreator();
-                    && ((XLayoutContainer) this.getSelectionModel().getSelection().getSelectedCreator().getParent()).acceptType(XWAbsoluteLayout.class)) {
+            if (creator != null && creator.getParent() != null
+                    && ((XLayoutContainer) creator.getParent()).acceptType(XWAbsoluteLayout.class)) {
                 return true;
             }
         }