Function IsSongPlaying()

Prototype	bool IsSongPlaying();
Description	Indicate the playing state of the music engine.
Parameters	None
Returns	true if song is currently playing, false otherwise.
Video Modes	All
Since	V1
Notes	If the song contains a loop, this function will never return false.

StartSong(song_ending);
while(1){
 if(!IsSongPlaying()){
  Print(10,10,PSTR("Song has ended!"));
  break;
 }
}