(svn r10444) -Codechange: switch to c++ classes and inheritance for sound/music/video drivers, using self-registration based on the blitter-model.

src/music/null_m.cpp

@@ -3,18 +3,5 @@
 #include "../stdafx.h"
 #include "null_m.h"
 
-static const char* NullMidiStart(const char* const* parm) { return NULL; }
-static void NullMidiStop() {}
-static void NullMidiPlaySong(const char *filename) {}
-static void NullMidiStopSong() {}
-static bool NullMidiIsSongPlaying() { return true; }
-static void NullMidiSetVolume(byte vol) {}
+static FMusicDriver_Null iFMusicDriver_Null;
 
-const HalMusicDriver _null_music_driver = {
-	NullMidiStart,
-	NullMidiStop,
-	NullMidiPlaySong,
-	NullMidiStopSong,
-	NullMidiIsSongPlaying,
-	NullMidiSetVolume,
-};