From d53a4f7d08ff8957376ca42159ecbfe2f71f12c3 Mon Sep 17 00:00:00 2001
From: Filipe Dias da Mota <filipediasmota@gmail.com>
Date: Fri, 20 Nov 2015 17:23:25 +0100
Subject: [PATCH] Prevent erros on ipaddr.IPv6.isValid if argument is null

---
 lib/ipaddr.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ipaddr.js b/lib/ipaddr.js
index 9d9b007..f516d1b 100644
--- a/lib/ipaddr.js
+++ b/lib/ipaddr.js
@@ -382,7 +382,7 @@
 
   ipaddr.IPv6.isValid = function(string) {
     var e;
-    if (string.indexOf(":") === -1) {
+    if (typeof string !== 'string' || string.indexOf(":") === -1) {
       return false;
     }
     try {