Issue 3960 - Console errors due to wrong variable name

lib/contentPolicy.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 256 matching lines @@
     for (let i = 0; i < frames.length; i++)
     {
       let frame = frames[i];
       let wndLocation = frame.location;
       let parentWndLocation = frames[Math.min(i + 1, frames.length - 1)].location;
       let parentDocDomain = getHostname(parentWndLocation);
 
       let match = defaultMatcher.matchesAny(wndLocation, typeMap, parentDocDomain, false, sitekey);
       if (match instanceof WhitelistFilter)
       {
-        let whitelistType = (whitelistMatch.contentType & RegExpFilter.typeMap.DOCUMENT) ? "DOCUMENT" : "ELEMHIDE";
+        let whitelistType = (match.contentType & RegExpFilter.typeMap.DOCUMENT) ? "DOCUMENT" : "ELEMHIDE";
         return [i, whitelistType, parentDocDomain, false, wndLocation, match];
       }
 
       if (!nogenericHit)
       {
         match = defaultMatcher.matchesAny(wndLocation,
             RegExpFilter.typeMap[genericType], parentDocDomain, false, sitekey);
         if (match instanceof WhitelistFilter)
           nogenericHit = [i, genericType, parentDocDomain, false, wndLocation, match];
       }
@@ skipping 135 matching lines @@
   {
     // EffectiveTLDService throws on IP addresses, just compare the host name
     let host = "";
     try
     {
       host = uri.host;
     } catch (e) {}
     return host != docDomain;
   }
 }