From ca1babe1f7b3609611e3880c7973ac728071a715 Mon Sep 17 00:00:00 2001
From: "Dora E. Mondrian" <33023863+doraemondrian@users.noreply.github.com>
Date: Mon, 23 Oct 2017 03:06:51 -0700
Subject: [PATCH] Use address type

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

diff --git a/contracts/crowdsale/Crowdsale.sol b/contracts/crowdsale/Crowdsale.sol
index 32eb1b4dd..26ed8df85 100644
--- a/contracts/crowdsale/Crowdsale.sol
+++ b/contracts/crowdsale/Crowdsale.sol
@@ -44,7 +44,7 @@ contract Crowdsale {
     require(_startTime >= now);
     require(_endTime >= _startTime);
     require(_rate > 0);
-    require(_wallet != 0x0);
+    require(_wallet != address(0));
 
     token = createTokenContract();
     startTime = _startTime;
@@ -67,7 +67,7 @@ contract Crowdsale {
 
   // low level token purchase function
   function buyTokens(address beneficiary) public payable {
-    require(beneficiary != 0x0);
+    require(beneficiary != address(0));
     require(validPurchase());
 
     uint256 weiAmount = msg.value;