Don't mark the current track as changed when falling off the end of the queue

src/audio/track_queue.cpp

@@ -200,6 +200,9 @@ auto TrackQueue::append(Item i) -> void {
 }
 
 auto TrackQueue::next() -> void {
+  bool changed = true;
+
+  {
     const std::unique_lock<std::shared_mutex> lock(mutex_);
     if (shuffle_) {
       shuffle_->next();
@@ -208,16 +211,23 @@ auto TrackQueue::next() -> void {
       if (pos_ + 1 >= tracks_.size()) {
         if (replay_) {
           pos_ = 0;
+        } else {
+          pos_ = tracks_.size();
+          changed = false;
         }
       } else {
         pos_++;
       }
     }
+  }
 
-  notifyChanged(true);
+  notifyChanged(changed);
 }
 
 auto TrackQueue::previous() -> void {
+  bool changed = true;
+
+  {
     const std::unique_lock<std::shared_mutex> lock(mutex_);
     if (shuffle_) {
       shuffle_->prev();
@@ -226,13 +236,16 @@ auto TrackQueue::previous() -> void {
       if (pos_ == 0) {
         if (repeat_) {
           pos_ = tracks_.size() - 1;
+        } else {
+          changed = false;
         }
       } else {
         pos_--;
       }
     }
+  }
 
-  notifyChanged(true);
+  notifyChanged(changed);
 }
 
 auto TrackQueue::finish() -> void {