dart:io SecureSocket error fixed.

sdk/lib/io/secure_socket.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.
 
 part of dart.io;
 
 /**
  * A high-level class for communicating securely over a TCP socket, using
  * TLS and SSL. The [SecureSocket] exposes both a [Stream] and an
  * [IOSink] interface, making it ideal for using together with
@@ skipping 653 matching lines @@
     if (_socketClosedWrite) return;
     var encrypted = _secureFilter.buffers[WRITE_ENCRYPTED];
     var plaintext = _secureFilter.buffers[WRITE_PLAINTEXT];
     while (true) {
       if (encrypted.length > 0) {
         // Write from the filter to the socket.
         int bytes = _socket.write(encrypted.data,
                                   encrypted.start,
                                   encrypted.length);
         encrypted.advanceStart(bytes);
-        if (encrypted.start < encrypted.length) {
+        if (encrypted.length > 0) {
           // The socket has blocked while we have data to write.
           // We must be notified when it becomes unblocked.
           _socket.writeEventsEnabled = true;
           _filterWriteEmpty = false;
           break;
         }
       } else {
         var plaintext = _secureFilter.buffers[WRITE_PLAINTEXT];
         if (plaintext.length > 0) {
            int plaintext_bytes = _secureFilter.processBuffer(WRITE_PLAINTEXT);
@@ skipping 53 matching lines @@
   void destroy();
   void handshake();
   void init();
   X509Certificate get peerCertificate;
   int processBuffer(int bufferIndex);
   void registerBadCertificateCallback(Function callback);
   void registerHandshakeCompleteCallback(Function handshakeCompleteHandler);
 
   List<_ExternalBuffer> get buffers;
 }