Switch usage of _DEBUG macro to NDEBUG.

webrtc/voice_engine/voice_engine_defines.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 117 matching lines @@
 
 // ----------------------------------------------------------------------------
 //  Macros
 // ----------------------------------------------------------------------------
 
 #define NOT_SUPPORTED(stat)                 \
   LOG_F(LS_ERROR) << "not supported";       \
   stat.SetLastError(VE_FUNC_NOT_SUPPORTED); \
   return -1;
 
-#if (defined(_DEBUG) && defined(_WIN32) && (_MSC_VER >= 1400))
+#if (!defined(NDEBUG) && defined(_WIN32) && (_MSC_VER >= 1400))
 #include <windows.h>
 #include <stdio.h>
 #define DEBUG_PRINT(...)       \
   {                            \
     char msg[256];             \
     sprintf(msg, __VA_ARGS__); \
     OutputDebugStringA(msg);   \
   }
 #else
 // special fix for visual 2003
 #define DEBUG_PRINT(exp) ((void)0)
-#endif  // defined(_DEBUG) && defined(_WIN32)
+#endif  // !defined(NDEBUG) && defined(_WIN32)
 
 #define CHECK_CHANNEL(channel)     \
   if (CheckChannel(channel) == -1) \
     return -1;
 
 // ----------------------------------------------------------------------------
 //  Inline functions
 // ----------------------------------------------------------------------------
 
 namespace webrtc {
@@ skipping 150 matching lines @@
 #define __cdecl
 #define LPSOCKADDR struct sockaddr *
 #define LPCSTR const char *
 #define ULONG unsigned long
 
 // Default device for Mac and iPhone
 #define WEBRTC_VOICE_ENGINE_DEFAULT_DEVICE 0
 #endif  // #ifdef WEBRTC_MAC
 
 #endif  // WEBRTC_VOICE_ENGINE_VOICE_ENGINE_DEFINES_H