Fix error reporting for socket write failure

runtime/bin/socket_impl.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.
 
 
 class _SocketBase {
   // Bit flags used when communicating between the eventhandler and
   // dart code. The EVENT flags are used to indicate events of
   // interest when sending a message from dart code to the
   // eventhandler. When receiving a message from the eventhandler the
@@ skipping 411 matching lines @@
           if (value is! int) {
             throw new FileIOException(
                 "List element is not an integer at index $j");
           }
           outBuffer[i] = value;
           j++;
         }
       }
       var result = _writeList(outBuffer, outOffset, bytes);
       if (result is OSError) {
+        _reportError(result, "Write failed");
         // If writing fails we return 0 as the number of bytes and
         // report the error on the error handler.
         result = 0;
-        _reportError(result, "Write failed");
       }
       return result;
     }
     throw new SocketIOException("writeList failed - invalid socket handle");
   }
 
   _writeList(List<int> buffer, int offset, int bytes)
       native "Socket_WriteList";
 
   bool _isErrorResponse(response) {
@@ skipping 143 matching lines @@
   bool _seenFirstOutEvent = false;
   bool _pipe = false;
   Function _clientConnectHandler;
   Function _clientWriteHandler;
   SocketInputStream _inputStream;
   SocketOutputStream _outputStream;
   String _remoteHost;
   int _remotePort;
   static SendPort _socketService;
 }