engine: move engine/audio/public to public/ directory

engine/audio/audio_pch.cpp

@@ -1,10 +0,0 @@
-//========= Copyright Valve Corporation, All rights reserved. ============//
-//
-// Purpose: 
-//
-// $Workfile:     $
-// $Date:         $
-// $NoKeywords: $
-//=============================================================================//
-
-#include "audio_pch.h"

engine/audio/audio_pch.h

@@ -62,5 +62,5 @@
 #include "xbox/xbox_win32stubs.h"
 #include <xhv2.h>
 #elif POSIX
-#include "audio/private/posix_stubs.h"
+#include "audio/posix_stubs.h"
 #endif

engine/audio/snd_win.cpp

@@ -107,7 +107,6 @@ IAudioDevice *IAudioDevice::AutoDetectInit( bool waveOnly )
 #elif defined( USE_SDL )
 		DevMsg( "Trying SDL Audio Interface\n" );
 		pDevice = Audio_CreateSDLAudioDevice();
-
 #ifdef NEVER
 		// Jul 2012. mikesart. E-mail exchange with Ryan Gordon after figuring out that
 		// Audio_CreatePulseAudioDevice() wasn't working on Ubuntu 12.04 (lots of stuttering).