fix:解决修改流程sql执行异常问题

ruoyi-system/src/main/java/com/ruoyi/system/entity/BpmProcessConfiguration.java

@@ -199,7 +199,7 @@ public class BpmProcessConfiguration extends BaseEntity {
     }
 
     public String getDelFlag() {
-        return delFlag.isEmpty() ? "0" : delFlag;
+        return (delFlag == null || delFlag.isEmpty()) ? "0" : delFlag;
     }
 
     public void setDelFlag(String delFlag) {