修改E签宝查询企业账号是否存在，返回错误信息的修改

suishenbang-wxportal/suishenbang-wxportal-common/src/main/java/com/dgtly/wxportal/service/impl/ESignServiceImpl.java

@@ -199,8 +199,12 @@ public class ESignServiceImpl implements ESignService {
     public String getAccountIdByThirdId(String loginName) {
         JSONObject json =null;
         JSONObject jsonObject = eSignHttpUtil.doGetGetJson(ESignUrl.getAccountIdByThirdId, json, loginName);
-        JSONObject result = (JSONObject)jsonObject.get("data");
-        return result.get("accountId").toString();
+        if (jsonObject!=null) {
+            JSONObject result = (JSONObject)jsonObject.get("data");
+            return result.get("accountId").toString();
+        }else{
+            return null;
+        }
     }
 
     /**