Issue 1160 - Fix acceptable ads not showing up sometimes

src/engine/Main.cpp

 #include <AdblockPlus.h>
 #include <functional>
 #include <vector>
 #include <thread>
 #include <Windows.h>
 
 #include "../shared/AutoHandle.h"
 #include "../shared/Communication.h"
 #include "../shared/Dictionary.h"
 #include "../shared/Utils.h"
@@ skipping 74 matching lines @@
     request >> procedure;
     switch (procedure)
     {
       case Communication::PROC_MATCHES:
       {
         std::string url;
         std::string type;
         std::string documentUrl;
         request >> url >> type >> documentUrl;
         referrerMapping.Add(url, documentUrl); 
-        AdblockPlus::FilterPtr filter = filterEngine->Matches(url, type, referrerMapping.BuildReferrerChain(url));
+        AdblockPlus::FilterPtr filter = filterEngine->Matches(url, type, referrerMapping.BuildReferrerChain(documentUrl));
         response << (filter && filter->GetType() != AdblockPlus::Filter::TYPE_EXCEPTION);
         break;
       }
       case Communication::PROC_GET_ELEMHIDE_SELECTORS:
       {
         std::string domain;
         request >> domain;
         WriteStrings(response, filterEngine->GetElementHidingSelectors(domain));
         break;
       }
@@ skipping 370 matching lines @@
     }
     catch (const std::runtime_error& e)
     {
       DebugException(e);
       return 1;
     }
   }
 
   return 0;
 }