fix queueevent message attempting to be send when the player is not connected

common/src/main/java/us/ajg0702/queue/common/QueueManagerImpl.java

@@ -433,6 +433,7 @@ public class QueueManagerImpl implements QueueManager {
             for (QueuePlayer queuePlayer : s.getQueue()) {
                 AdaptedPlayer player =  queuePlayer.getPlayer();
                 if (player == null || !player.isConnected()) continue;
+                if(player.getServerName() == null) continue;
                 main.getPlatformMethods().sendPluginMessage(player, "inqueueevent", "true");
             }
         }

platforms/velocity/src/main/java/us/ajg0702/queue/platforms/velocity/players/VelocityPlayer.java

@@ -106,7 +106,7 @@ public class VelocityPlayer implements AdaptedPlayer, Audience {
     @Override
     public String getServerName() {
         Optional<ServerConnection> serverConnection = handle.getCurrentServer();
-        if(!serverConnection.isPresent()) return "none";
+        if(!serverConnection.isPresent()) return null;
         ServerConnection connection = serverConnection.get();
         return connection.getServerInfo().getName();
     }