Fix Name if leader null

Signed-off-by: Lixfel <agga-games@gmx.de>

FightSystem_Core/src/de/steamwar/fightsystem/commands/GUI.java

@@ -50,7 +50,8 @@ public class GUI {
     @SuppressWarnings("deprecation")
     private static void addTeamRequest(Player p, SWInventory inv, int pos, FightTeam team) {
         byte colorCode = ColorConverter.chat2dye(team.getColor()).getDyeData();
-        inv.setItem(pos, SWItem.getDye(colorCode), colorCode, msg.parse("JOIN_REQUEST_TEAM", p, team.getColor() + team.getLeader().getEntity().getName()), click -> {
+        String name = team.getLeader() != null ? team.getLeader().getEntity().getName() : team.getName();
+        inv.setItem(pos, SWItem.getDye(colorCode), colorCode, msg.parse("JOIN_REQUEST_TEAM", p, team.getColor() + name), click -> {
             p.closeInventory();
             new JoinRequest(p, team);
         });