From 42e4e1866728de5725cfdfbcb612b42f3e569c2a Mon Sep 17 00:00:00 2001
From: Gustav Simonsson <gustav.simonsson@gmail.com>
Date: Mon, 26 Sep 2016 01:25:50 -0400
Subject: [PATCH] [release 1.4.12] core: short-circuit balance change if zero
 value

(cherry picked from commit 25ed5feddadea8201974bfacb2a57d060b697acb)
---
 core/state/state_object.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/core/state/state_object.go b/core/state/state_object.go
index 20da1006f..7a7f6c04b 100644
--- a/core/state/state_object.go
+++ b/core/state/state_object.go
@@ -154,6 +154,9 @@ func (self *StateObject) Update() {
 }
 
 func (c *StateObject) AddBalance(amount *big.Int) {
+	if amount.Cmp(common.Big0) == 0 {
+		return
+	}
 	c.SetBalance(new(big.Int).Add(c.balance, amount))
 
 	if glog.V(logger.Core) {
@@ -162,6 +165,9 @@ func (c *StateObject) AddBalance(amount *big.Int) {
 }
 
 func (c *StateObject) SubBalance(amount *big.Int) {
+	if amount.Cmp(common.Big0) == 0 {
+		return
+	}
 	c.SetBalance(new(big.Int).Sub(c.balance, amount))
 
 	if glog.V(logger.Core) {