using .n when rpl is disabled will stop the queue

src/NadekoBot/Services/Music/MusicPlayer.cs

@@ -252,8 +252,12 @@ namespace NadekoBot.Services.Music
                         // ignore rcs if song is manually skipped
 
                         int queueCount;
+                        bool stopped;
                         lock (locker)
+                        {
                             queueCount = Queue.Count;
+                            stopped = Stopped;
+                        }
 
                         if (!manualIndex && (!RepeatCurrentSong || manualSkip))
                         {
@@ -320,6 +324,7 @@ namespace NadekoBot.Services.Music
                                     _log.Info("Next song");
                                     lock (locker)
                                     {
+                                        if(!Stopped)
                                             Queue.Next();
                                     }
                                 }
@@ -422,6 +427,12 @@ namespace NadekoBot.Services.Music
                 // if player is stopped, and user uses .n, it should play current song.  
                 // It's a bit weird, but that's the least annoying solution
                 if (!Stopped)
+                    if (!RepeatPlaylist && Queue.IsLast()) // if it's the last song in the queue, and repeat playlist is disabled
+                    { //stop the queue
+                        Stop();
+                        return;
+                    }
+                    else
                         Queue.Next(skipCount - 1);
                 else
                     Queue.CurrentIndex = 0;

src/NadekoBot/Services/Music/MusicQueue.cs

@@ -172,5 +172,11 @@ namespace NadekoBot.Services.Music
                 Songs.Remove(song);
             }
         }
+
+        public bool IsLast()
+        {
+            lock (locker)
+                return CurrentIndex == Songs.Count - 1;
+        }
     }
 }