丽知：钉钉回调空指针修改

buildpackage/src/main/java/com/hzya/frame/plugin/lets/dingtalk/callback/service/impl/CallBackServiceImpl.java

@@ -106,6 +106,7 @@ public class CallBackServiceImpl implements CallBackService {
             String eventType = eventJson.getString("EventType");
 
             //防止钉钉回调
+            if(eventJson.getString("processInstanceId")!=null) {
                 if (!eventJson.getString("processInstanceId").equals(dingId)) {
                     dingId = eventJson.getString("processInstanceId");
 
@@ -127,6 +128,7 @@ public class CallBackServiceImpl implements CallBackService {
                         }
                     }
                 }
+            }
 
             // 5. 返回success的加密数据
             Map<String, String> successMap = callbackCrypto.getEncryptedMap("success");