From 79eb94d3cd96e0d65a4fec020fc1218dd3320b76 Mon Sep 17 00:00:00 2001
From: "Hao (Alan) Tang" <7888785@qq.com>
Date: Thu, 1 Nov 2018 11:27:51 -0700
Subject: [PATCH] fix ERC20.sol#L174 and ERC20.sol#L187 should be casted to an
 address type. (#1470)

---
 contracts/token/ERC20/ERC20.sol | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/contracts/token/ERC20/ERC20.sol b/contracts/token/ERC20/ERC20.sol
index 25b2694a2..77a88be62 100644
--- a/contracts/token/ERC20/ERC20.sol
+++ b/contracts/token/ERC20/ERC20.sol
@@ -171,7 +171,7 @@ contract ERC20 is IERC20 {
    * @param value The amount that will be created.
    */
   function _mint(address account, uint256 value) internal {
-    require(account != 0);
+    require(account != address(0));
     _totalSupply = _totalSupply.add(value);
     _balances[account] = _balances[account].add(value);
     emit Transfer(address(0), account, value);
@@ -184,7 +184,7 @@ contract ERC20 is IERC20 {
    * @param value The amount that will be burnt.
    */
   function _burn(address account, uint256 value) internal {
-    require(account != 0);
+    require(account != address(0));
     require(value <= _balances[account]);
 
     _totalSupply = _totalSupply.sub(value);