/*  call-seq:
 *     rewind()  ->  self
 *
 *  Rewind the music to the start. This is safe to use on stopped, paused, and playing music. 
 *  Only works for MOD, OGG, MP3, and MIDI (but not WAV).
 * 
 */
VALUE rbgm_mixmusic_rewind(VALUE self)
{
  Mix_RewindMusic();
  return self;
}