FilterEngine API improvements

shell/src/MatchesCommand.cpp

 #include <iostream>
 #include <sstream>
 
 #include "MatchesCommand.h"
 
 MatchesCommand::MatchesCommand(AdblockPlus::FilterEngine& filterEngine)
   : Command("matches"), filterEngine(filterEngine)
 {
 }
 
 void MatchesCommand::operator()(const std::string& arguments)
 {
   std::istringstream argumentStream(arguments);
   std::string url;
   argumentStream >> url;
   std::string contentType;
   argumentStream >> contentType;
   std::string documentUrl;
   argumentStream >> documentUrl;
   if (!url.size() || !contentType.size() || !documentUrl.size())
   {
     ShowUsage();
     return;
   }
 
-  AdblockPlus::Filter* match = filterEngine.Matches(url, contentType, documentUrl);
+  AdblockPlus::FilterPtr match = filterEngine.Matches(url, contentType, documentUrl);
   if (!match)
     std::cout << "No match" << std::endl;
   else if (match->GetProperty("type", "") == "exception")
     std::cout << "Whitelisted" << std::endl;
   else
     std::cout << "Blocked" << std::endl;
 }
 
 std::string MatchesCommand::GetDescription() const
 {
   return "Returns the first filter that matches the supplied URL";
 }
 
 std::string MatchesCommand::GetUsage() const
 {
   return name + " URL CONTENT_TYPE DOCUMENT_URL";
 }