Do not build these as part of plClient.

Sources/Plasma/PubUtilLib/plAudioCore/plWavFile.cpp

@@ -26,6 +26,8 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
 #include <stdio.h>
 #include "plWavFile.h"
 
+#ifdef MAXPLUGINCODE
+
 #ifdef DX_OLD_SDK
     #include <dxerr9.h>
 #else
@@ -1091,3 +1093,5 @@ public:
 };
 
 #endif
+
+#endif //MAXPLUGINCODE

Sources/Plasma/PubUtilLib/plAudioCore/plWavFile.h

@@ -26,6 +26,7 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
 #ifndef plWavFile_H
 #define plWavFile_H
 
+#ifdef MAXPLUGINCODE
 #define WAVEFILE_READ   1
 #define WAVEFILE_WRITE  2
 
@@ -110,5 +111,6 @@ protected:
     HRESULT WriteMMIO( WAVEFORMATEX *pwfxDest );
     HRESULT IClose();
 };
+#endif //MAXPLUGINCODE
 
 #endif // plWavFile_H