- Fix Windows build.

runtime/vm/atomic_win.h

 // 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.
 
 #ifndef VM_ATOMIC_WIN_H_
 #define VM_ATOMIC_WIN_H_
 
 #if !defined VM_ATOMIC_H_
 #error Do not include atomic_win.h directly. Use atomic.h instead.
 #endif
@@ skipping 15 matching lines @@
   UNIMPLEMENTED();
 #endif
 }
 
 
 inline uword AtomicOperations::CompareAndSwapWord(uword* ptr,
                                                   uword old_value,
                                                   uword new_value) {
 #if defined(TARGET_ARCH_X64)
   return static_cast<uword>(
-      InterlockedCompareExchange64(reinterpret_cast<LONG*>(ptr),
-                                   static_cast<LONG>(new_value),
-                                   static_cast<LONG>(old_value)));
+      InterlockedCompareExchange64(reinterpret_cast<LONGLONG*>(ptr),
+                                   static_cast<LONGLONG>(new_value),
+                                   static_cast<LONGLONG>(old_value)));
 #elif defined(TARGET_ARCH_IA32)
   return static_cast<uword>(
-      InterlockedCompareExchange(reinterpret_cast<LONGLONG*>(ptr),
-                                 static_cast<LONGLONG>(new_value),
-                                 static_cast<LONGLONG>(old_value)));
+      InterlockedCompareExchange(reinterpret_cast<LONG*>(ptr),
+                                 static_cast<LONG>(new_value),
+                                 static_cast<LONG>(old_value)));
 #else
   UNIMPLEMENTED();
 #endif
 }
 
 }  // namespace dart
 
 #endif  // VM_ATOMIC_WIN_H_