Parenthesize expression using bit-wise and on windows

dart/runtime/bin/eventhandler_win.cc

 // 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.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/eventhandler.h"
 #include "bin/eventhandler_win.h"
 
@@ skipping 867 matching lines @@
   closed_ = true;
 }
 
 
 void ClientSocket::ConnectComplete(OverlappedBuffer* buffer) {
   OverlappedBuffer::DisposeBuffer(buffer);
   // Update socket to support full socket API, after ConnectEx completed.
   setsockopt(socket(), SOL_SOCKET, SO_UPDATE_CONNECT_CONTEXT, NULL, 0);
   // If the port is set, we already listen for this socket in Dart.
   // Handle the cases here.
-  if (!IsClosedRead() && (Mask() & (1 << kInEvent) != 0)) {
+  if (!IsClosedRead() && ((Mask() & (1 << kInEvent)) != 0)) {
     IssueRead();
   }
-  if (!IsClosedWrite() && (Mask() & (1 << kOutEvent) != 0)) {
+  if (!IsClosedWrite() && ((Mask() & (1 << kOutEvent)) != 0)) {
     Dart_Port port = NextNotifyDartPort(1 << kOutEvent);
     DartUtils::PostInt32(port, 1 << kOutEvent);
   }
 }
 
 
 void ClientSocket::EnsureInitialized(
     EventHandlerImplementation* event_handler) {
   ScopedLock lock(this);
   if (completion_port_ == INVALID_HANDLE_VALUE) {
@@ skipping 478 matching lines @@
 
 
 void EventHandlerImplementation::Shutdown() {
   SendData(kShutdownId, 0, 0);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)