Allow for seamless song playback when changing the tick in SongPlayer#onSongFinished

Author: RaphiMC

src/main/java/net/raphimc/noteblocklib/player/SongPlayer.java

@@ -227,7 +227,9 @@ protected void tick() {
                 this.tick++;
                 if (this.tick >= this.song.getNotes().getLengthInTicks()) {
                     this.onSongFinished();
-                    return;
+                    if (!this.isRunning()) {
+                        return; // Return if the song got stopped in the onSongFinished method
+                    }
                 }
                 if (this.ticksPerSecond != this.song.getTempoEvents().getEffectiveTempo(this.tick)) {
                     this.ticksPerSecond = this.song.getTempoEvents().getEffectiveTempo(this.tick);