From 4f1524966a99c83db8c0c9f1ff74789253a1171e Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Mon, 15 Dec 2014 09:11:16 +0100
Subject: Replace direct use of 0 with SetNull and IsNull

Replace x=0 with .SetNull(),
x==0 with IsNull(), x!=0 with !IsNull().
Replace uses of uint256(0) with uint256().
---
 src/primitives/block.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/primitives/block.cpp')

diff --git a/src/primitives/block.cpp b/src/primitives/block.cpp
index 2b6a302ee..3b4a36039 100644
--- a/src/primitives/block.cpp
+++ b/src/primitives/block.cpp
@@ -74,7 +74,7 @@ uint256 CBlock::BuildMerkleTree(bool* fMutated) const
     if (fMutated) {
         *fMutated = mutated;
     }
-    return (vMerkleTree.empty() ? 0 : vMerkleTree.back());
+    return (vMerkleTree.empty() ? uint256() : vMerkleTree.back());
 }
 
 std::vector<uint256> CBlock::GetMerkleBranch(int nIndex) const
@@ -96,7 +96,7 @@ std::vector<uint256> CBlock::GetMerkleBranch(int nIndex) const
 uint256 CBlock::CheckMerkleBranch(uint256 hash, const std::vector<uint256>& vMerkleBranch, int nIndex)
 {
     if (nIndex == -1)
-        return 0;
+        return uint256();
     for (std::vector<uint256>::const_iterator it(vMerkleBranch.begin()); it != vMerkleBranch.end(); ++it)
     {
         if (nIndex & 1)
-- 
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