Hotfix some player connection issues for title sending

src/de/steamwar/bungeecore/network/handlers/FightEndsHandler.java

@@ -159,6 +159,8 @@ public class FightEndsHandler extends PacketHandler {
     }
 
     private void send(ProxiedPlayer player, String text, BaseComponent[] eloGainComponent) {
+        if (player == null) return;
+        if (!player.isConnected()) return;
         Title title = new BungeeTitle().title(TextComponent.fromLegacyText(text))
                 .subTitle(eloGainComponent)
                 .fadeIn(5)