Fix type checking of void type.

samples/chat/chat_server_lib.dart

 // Copyright (c) 2012, the Dart 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 file.
 
 #library("chat_server");
 #import("dart:io");
 #import("dart:isolate");
 #import("dart:json");
 
 class ChatServer extends IsolatedServer {
@@ skipping 40 matching lines @@
 }
 
 
 class User {
   User(this._handle) {
     // TODO(sgjesse) Generate more secure and unique session id's.
     _sessionId = "a${(Math.random() * 1000000).toInt()}";
     markActivity();
   }
 
-  void markActivity() => _lastActive = new Date.now();
+  void markActivity() { _lastActive = new Date.now(); }
   Duration idleTime(Date now) => now.difference(_lastActive);
 
   String get handle() => _handle;
   String get sessionId() => _sessionId;
 
   String _handle;
   String _sessionId;
   Date _lastActive;
 }
 
@@ skipping 11 matching lines @@
   Message(this._from, this._message)
       : _received = new Date.now(), _type = MESSAGE;
   Message.leave(this._from)
       : _received = new Date.now(), _type = LEAVE;
   Message.timeout(this._from)
       : _received = new Date.now(), _type = TIMEOUT;
 
   User get from() => _from;
   Date get received() => _received;
   String get message() => _message;
-  void set messageNumber(int n) => _messageNumber = n;
+  void set messageNumber(int n) { _messageNumber = n; }
 
   Map toMap() {
     Map map = new Map();
     map["from"] = _from.handle;
     map["received"] = _received.toString();
     map["type"] = _typeName[_type];
     if (_type == MESSAGE) map["message"] = _message;
     map["number"] = _messageNumber;
     return map;
   }
@@ skipping 575 matching lines @@
     }
   }
 
   int _timeRange;
   List<int> _buckets;
   int _currentBucket;
   int _currentBucketTime;
   num _bucketTimeRange;
   int _sum;
 }