From 6cc888dd992bd9c3ebd2043dd63c61896f78b1f7 Mon Sep 17 00:00:00 2001
From: jl777 <jameslee777@yahoo.com>
Date: Wed, 25 Apr 2018 02:55:40 +0300
Subject: [PATCH] Set second

---
 src/main.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index c7192673d..af92dc85a 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3312,8 +3312,10 @@ CBlockIndex* AddToBlockIndex(const CBlockHeader& block)
     uint256 hash = block.GetHash();
     BlockMap::iterator it = mapBlockIndex.find(hash);
     if (it != mapBlockIndex.end())
-        return it->second;
-    
+    {
+        if ( it->second != 0 )
+            return it->second;
+    }
     // Construct new block index object
     CBlockIndex* pindexNew = new CBlockIndex(block);
     assert(pindexNew);