Fix GameHost f-ns calling on non-host

src/game_scene/game_host.gd

@@ -319,6 +319,9 @@ func _get_player_name_list(player_list: Array[Player]) -> Array[String]:
 #########################
 
 func _on_players_created():
+	if !multiplayer.is_server():
+		return
+
 	var player_list: Array[Player] = PlayerManager.get_player_list()
 
 	for player in player_list:
@@ -337,6 +340,9 @@ func _on_players_created():
 # Also in this timeout, tell clients about which players are
 # lagging.
 func _on_alive_check_timer_timeout():
+	if !multiplayer.is_server():
+		return
+
 	if _state != HostState.WAITING_FOR_LAGGING_PLAYERS:
 		return