Implement I_MIDIPlaying, I_MusicPlaying, I_MusicPaused in other targets

# Conflicts:
#	src/nds/i_sound.c
#	src/sdl12/sdl_sound.c
#	src/win32ce/win_snd.c

src/android/i_sound.c

@@ -74,6 +74,21 @@ void I_ResumeSong(INT32 handle)
         (void)handle;
 }
 
+boolean I_MIDIPlaying(void)
+{
+	return false;
+}
+
+boolean I_MusicPlaying(void)
+{
+	return false;
+}
+
+boolean I_MusicPaused(void)
+{
+	return false;
+}
+
 //
 //  MIDI I/O
 //

src/djgppdos/i_sound.c

@@ -474,6 +474,7 @@ void I_StopSong(INT32 handle)
 	stop_midi();
 }
 
+
 // Is the song playing?
 #if 0
 int I_QrySongPlaying(int handle)
@@ -560,3 +561,18 @@ UINT32 I_GetSongPosition(void)
 {
     return 0.;
 }
+
+boolean I_MIDIPlaying(void)
+{
+	return (boolean)currsong && music_started;
+}
+
+boolean I_MusicPlaying(void)
+{
+	return (boolean)currsong && music_started;
+}
+
+boolean I_MusicPaused(void)
+{
+	return false;
+}

src/dummy/i_sound.c

@@ -156,3 +156,18 @@ UINT32 I_GetSongPosition(void)
 {
     return 0;
 }
+
+boolean I_MIDIPlaying(void)
+{
+	return false;
+}
+
+boolean I_MusicPlaying(void)
+{
+	return false;
+}
+
+boolean I_MusicPaused(void)
+{
+	return false;
+}

src/sdl/sdl_sound.c

@@ -1649,6 +1649,22 @@ void I_StopSong(INT32 handle)
 #endif
 }
 
+boolean I_MIDIPlaying(void)
+{
+	// todo: no way to tell specifically if MIDI is playing, implement midimode
+	return !nomidimusic && nodigimusic && musicStarted;
+}
+
+boolean I_MusicPlaying(void)
+{
+	return musicStarted;
+}
+
+boolean I_MusicPaused(void)
+{
+	return Mix_PausedMusic();
+}
+
 void I_UnRegisterSong(INT32 handle)
 {
 #ifdef HAVE_MIXER