From 28782017ba9782206ec2313fd20302de5f6f7f5e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eduardo=20Gusm=C3=A3o?= <eduguscontra3@hotmail.com>
Date: Wed, 14 Aug 2019 11:29:26 -0300
Subject: [PATCH] util modulo11

---
 src/Util.php | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/Util.php b/src/Util.php
index 08b4ba7f..a694830c 100644
--- a/src/Util.php
+++ b/src/Util.php
@@ -540,9 +540,8 @@ public static function fatorVencimentoBack($factor, $format = 'Y-m-d')
     public static function modulo11($n, $factor = 2, $base = 9, $x10 = 0, $resto10 = 0)
     {
         $sum = 0;
-        $n = (int) $n;
         for ($i = mb_strlen($n); $i > 0; $i--) {
-            $sum += mb_substr($n, $i - 1, 1)*$factor;
+            $sum += ((int) mb_substr($n, $i - 1, 1))*$factor;
             if ($factor == $base) {
                 $factor = 1;
             }