From a2205739b1224d5f28aeae395ed87488d6b32727 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Mon, 30 Jun 2014 16:31:43 -0700
Subject: [PATCH] Fix build.

---
 format.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/format.h b/format.h
index 6d4aa95d..a9d2311c 100644
--- a/format.h
+++ b/format.h
@@ -1137,6 +1137,8 @@ class SystemError : public internal::SystemErrorBase {
  protected:
   int error_code_;
 
+  SystemError() {}
+
  public:
   /**
    \rst