From b60e434e0b300db45ccc03109b3298867e7f45fb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mart=C3=ADn=20Triay?= <martriay@gmail.com>
Date: Mon, 16 Oct 2017 03:48:32 -0300
Subject: [PATCH] [TokenVesting] Add missing safemath ops

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

diff --git a/contracts/token/TokenVesting.sol b/contracts/token/TokenVesting.sol
index a4ca4b088..da6d4a53f 100644
--- a/contracts/token/TokenVesting.sol
+++ b/contracts/token/TokenVesting.sol
@@ -106,10 +106,10 @@ contract TokenVesting is Ownable {
 
     if (now < cliff) {
       return 0;
-    } else if (now >= start + duration || revoked[token]) {
+    } else if (now >= start.add(duration) || revoked[token]) {
       return totalBalance;
     } else {
-      return totalBalance.mul(now - start).div(duration);
+      return totalBalance.mul(now.sub(start)).div(duration);
     }
   }
 }