Fix checked mode error in previous commit

runtime/bin/socket_patch.dart

 // Copyright (c) 2013, 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.
 
 patch class RawServerSocket  {
   /* patch */ static Future<RawServerSocket> bind(address,
                                                   int port,
                                                   {int backlog: 0,
                                                    bool v6Only: false}) {
     return _RawServerSocket.bind(address, port, backlog, v6Only);
@@ skipping 757 matching lines @@
     return new _RawSocket(native);
   }
 
   factory _RawSocket._readPipe(int fd) {
     var native = new _NativeSocket.pipe();
     native.isClosedWrite = true;
     if (fd != null) _getStdioHandle(native, fd);
     var result = new _RawSocket(native);
     result._isMacOSTerminalInput =
         Platform.isMacOS &&
-        _StdIOUtils._socketType(result) == _STDIO_HANDLE_TYPE_TERMINAL;
+        _StdIOUtils._socketType(result._socket) == _STDIO_HANDLE_TYPE_TERMINAL;
     return result;
   }
 
   StreamSubscription<RawSocketEvent> listen(void onData(RawSocketEvent event),
                                             {void onError(Object error),
                                              void onDone(),
                                              bool cancelOnError}) {
     return _controller.stream.listen(
         onData,
         onError: onError,
@@ skipping 403 matching lines @@
     if (_detachReady != null) {
       _detachReady.complete(null);
     } else {
       if (_raw != null) {
         _raw.shutdown(SocketDirection.SEND);
         _disableWriteEvent();
       }
     }
   }
 }