bugfix, if loop queue after last, next is first

Author: chrisweb

src/library/core.ts

@@ -998,6 +998,9 @@ export class PlayerCore {
                     if (this._queue[this._currentIndex + 1] !== undefined) {
                         soundIndex = this._currentIndex + 1;
                         sound = this._queue[soundIndex];
+                    } else if (this._loopQueue) {
+                        soundIndex = 0;
+                        sound = this._queue[soundIndex];
                     }
                     break;
                 case PlayerCore.PLAY_SOUND_PREVIOUS: