From af337047a4eb323b2c914bf71eeb0b15e33a65a5 Mon Sep 17 00:00:00 2001
From: Facundo Spagnuolo <facundo_spagnuolo@icloud.com>
Date: Wed, 17 Jan 2018 12:00:15 -0300
Subject: [PATCH] Fix solint errors

---
 contracts/mocks/ERC721TokenMock.sol |  2 +-
 contracts/token/ERC721Token.sol     | 13 +++++++------
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/contracts/mocks/ERC721TokenMock.sol b/contracts/mocks/ERC721TokenMock.sol
index b14f66641..394d408f4 100644
--- a/contracts/mocks/ERC721TokenMock.sol
+++ b/contracts/mocks/ERC721TokenMock.sol
@@ -1,6 +1,6 @@
 pragma solidity ^0.4.18;
 
-import '../token/ERC721Token.sol';
+import "../token/ERC721Token.sol";
 
 /**
  * @title ERC721TokenMock
diff --git a/contracts/token/ERC721Token.sol b/contracts/token/ERC721Token.sol
index 53457dd23..8e30fba6e 100644
--- a/contracts/token/ERC721Token.sol
+++ b/contracts/token/ERC721Token.sol
@@ -1,7 +1,7 @@
 pragma solidity ^0.4.18;
 
-import './ERC721.sol';
-import '../math/SafeMath.sol';
+import "./ERC721.sol";
+import "../math/SafeMath.sol";
 
 /**
  * @title ERC721Token
@@ -97,9 +97,10 @@ contract ERC721Token is ERC721 {
   function approve(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
     address owner = ownerOf(_tokenId);
     require(_to != owner);
-    if(approvedFor(_tokenId) == 0 && _to == 0) return;
-    tokenApprovals[_tokenId] = _to;
-    Approval(owner, _to, _tokenId);
+    if (approvedFor(_tokenId) != 0 || _to != 0) {
+      tokenApprovals[_tokenId] = _to;
+      Approval(owner, _to, _tokenId);
+    }
   }
 
   /**
@@ -127,7 +128,7 @@ contract ERC721Token is ERC721 {
   * @param _tokenId uint256 ID of the token being burned by the msg.sender
   */
   function burn(uint256 _tokenId) onlyOwnerOf(_tokenId) internal {
-    if(approvedFor(_tokenId) != 0) {
+    if (approvedFor(_tokenId) != 0) {
       clearApproval(msg.sender, _tokenId);
     }
     removeToken(msg.sender, _tokenId);