!63 fix(bpm): 修复节点默认审批意见 MyBatis 查询缺失列，补充条件变量原始字段返回

* fix(bpm): 修复节点默认审批意见 MyBatis 查询缺失列，补充条件变量原始字段返回
* feat(bpm): 流程节点支持配置默认审批意见，按条件变量动态选择

jeecg-module-supervision/src/main/java/org/jeecg/modules/bg/xispeak/service/impl/BgXiSpeakServiceImpl.java

@@ -5,6 +5,7 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.flowable.engine.HistoryService;
 import org.flowable.engine.RuntimeService;
+import java.util.Objects;
 import org.jeecg.common.exception.JeecgBootException;
 import org.jeecg.common.util.oConvertUtils;
 import org.jeecg.common.system.vo.SelectTreeModel;
@@ -72,8 +73,10 @@ public class BgXiSpeakServiceImpl extends ServiceImpl<BgXiSpeakMapper, BgXiSpeak
 		}
 		String old_pid = entity.getPid();
 		String new_pid = bgXiSpeak.getPid();
-		if(!old_pid.equals(new_pid)) {
-			updateOldParentNode(old_pid);
+		if(!Objects.equals(old_pid, new_pid)) {
+			if (old_pid != null) {
+				updateOldParentNode(old_pid);
+			}
 			if(oConvertUtils.isEmpty(new_pid)){
 				bgXiSpeak.setPid(IBgXiSpeakService.ROOT_PID_VALUE);
 			}