From 227c7aae0f9d9779d5dbf7b5f962013ae3f7c465 Mon Sep 17 00:00:00 2001
From: Augusto <augusto.lemble@gmail.com>
Date: Thu, 15 Jun 2017 20:24:17 -0300
Subject: [PATCH] added check to ret boolean on ECRecovery

---
 contracts/ECRecovery.sol | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/contracts/ECRecovery.sol b/contracts/ECRecovery.sol
index 580e5a66d..bd4b162ee 100644
--- a/contracts/ECRecovery.sol
+++ b/contracts/ECRecovery.sol
@@ -62,7 +62,11 @@ library ECRecovery {
     bool ret;
     address addr;
     (ret, addr) = safeRecover(hash, v, r, s);
-    return addr;
+
+    if (!ret)
+      return address(0);
+    else
+      return addr;
   }
 
 }