From 843fb2ea32d4f0b2d1f3667545487c8084229819 Mon Sep 17 00:00:00 2001
From: Yu Yang <yuyang18@baidu.com>
Date: Thu, 19 Jan 2017 15:12:42 +0800
Subject: [PATCH] Make code more readable

---
 paddle/utils/Error.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/paddle/utils/Error.h b/paddle/utils/Error.h
index 6fe7b6ea888..2b4fbef4e01 100644
--- a/paddle/utils/Error.h
+++ b/paddle/utils/Error.h
@@ -15,6 +15,7 @@ limitations under the License. */
 #pragma once
 
 #include <glog/logging.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <memory>
 #include <string>
@@ -113,7 +114,7 @@ public:
   /**
    * @brief operator bool, return True if there is no error.
    */
-  operator bool() const { return !msg_; }
+  operator bool() const { return msg_ == nullptr; }
 
   /**
    * @brief check this status by glog.
-- 
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