From d367cff8c545785060b7cb877fa60057b0e3ca2c Mon Sep 17 00:00:00 2001
From: fkloft <felix.kloft+github@gmail.com>
Date: Sat, 10 Oct 2015 23:56:46 +0200
Subject: [PATCH] Fix pull request

---
 code/hooks.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/code/hooks.js b/code/hooks.js
index 44c6826c..26c4bb9d 100644
--- a/code/hooks.js
+++ b/code/hooks.js
@@ -110,6 +110,10 @@ window.removeHook = function(event, callback) {
   if (typeof callback !== 'function') throw('Callback must be a function.');
 
   if (_hooks[event]) {
-    _hooks[event].splice(_hooks[event].indexOf(callback), 1);
+    var index = _hooks[event].indexOf(callback);
+    if(index == -1)
+      console.warn('Callback wasn\'t registered for this event.');
+    else
+      _hooks[event].splice(index, 1);
   }
 }