fix not closing lobbies

backend/bang/game.py

@@ -610,7 +610,7 @@ class Game:
         self.is_handling_death = True
         import bang.expansions.dodge_city.characters as chd
         print(f'{self.name}: the killer is {player.attacker}')
-        if self.dd_api:
+        if self.dd_api and player.character and player.role:
             self.dd_api.Metric.send(metric='player_death', points=[(int(time.time()), 1)], tags=["server:backend", f"host:{os.environ['HOST']}", f"char:{player.character.name}", f"role:{player.role.name}"])
         if len([c for c in player.gold_rush_equipment if isinstance(c, grc.Ricercato)]) > 0 and player.attacker and player.attacker in self.players:
             player.attacker.gold_nuggets += 1