Missed one include file for irrKlang in commit 1fede6d76c640bcb4ae1.

src/dep/include/irrklang/ik_ISoundMixedOutputReceiver.h

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+// Copyright (C) 2002-2009 Nikolaus Gebhardt
+// This file is part of the "irrKlang" library.
+// For conditions of distribution and use, see copyright notice in irrKlang.h
+
+#ifndef __I_IRRKLANG_SOUND_MIXED_OUTPUT_RECEIVER_H_INCLUDED__
+#define __I_IRRKLANG_SOUND_MIXED_OUTPUT_RECEIVER_H_INCLUDED__
+
+#include "ik_IRefCounted.h"
+#include "ik_SAudioStreamFormat.h"
+
+
+namespace irrklang
+{
+
+
+//! Interface to be implemented by the user, which recieves the mixed output when it it played by the sound engine.
+/** This can be used to store the sound output as .wav file or for creating a Oscillograph or similar. 
+ Simply implement your own class derived from ISoundMixedOutputReceiver and use ISoundEngine::setMixedDataOutputReceiver
+ to let the audio driver know about it. */
+class ISoundMixedOutputReceiver
+{
+public:
+    
+	//! destructor
+	virtual ~ISoundMixedOutputReceiver() {};
+
+	//! Called when a chunk of sound has been mixed and is about to be played. 
+	/** Note: This is called from the playing thread of the sound library, so you need to 
+	make everything you are doing in this method thread safe. Additionally, it would
+	be a good idea to do nothing complicated in your implementation and return as fast as possible,
+	otherwise sound output may be stuttering.
+	\param data representing the sound frames which just have been mixed. Sound data always
+	consists of two interleaved sound channels at 16bit per frame. 
+	 \param byteCount Amount of bytes of the data 
+	 \param playbackrate The playback rate at samples per second (usually something like 44000). 
+	 This value will not change and always be the same for an instance of an ISoundEngine. */
+	virtual void OnAudioDataReady(const void* data, int byteCount, int playbackrate) = 0;
+
+};
+
+
+} // end namespace irrklang
+
+
+#endif
+