Minor fixes to the mDNS package

pkg/mdns/lib/src/native_protocol_client.dart

 // Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 library mdns.src.native_protocol_client;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:io';
 
@@ skipping 114 matching lines @@
 
   Stream<ResourceRecord> lookup(
       int type,
       String name,
       {Duration timeout: const Duration(seconds: 5)}) {
     if (!_started) {
       throw new StateError('mDNS client is not started');
     }
 
     // Look for entries in the cache.
-    List<ResourceRecordCache> cached = <ResourceRecord>[];
+    List<ResourceRecord> cached = <ResourceRecord>[];
     cache.lookup(name, type, cached);
     if (cached.isNotEmpty) {
       StreamController controller = new StreamController();
       cached.forEach(controller.add);
       controller.close();
       return controller.stream;
     }
 
     // Add the pending request before sending the query.
     var results = _resolver.addPendingRequest(type, name, timeout);
@@ skipping 12 matching lines @@
     if (event == RawSocketEvent.READ) {
       Datagram datagram = _incoming.receive();
       List<ResourceRecord> response = decodeMDnsResponse(datagram.data);
       if (response != null) {
         cache.updateRecords(response);
         _resolver.handleResponse(response);
       }
     }
   }
 }