fix crash on force starting, kicking players (#6307)

* fix crash on force starting, kicking players

* Update server_game.cpp

---------

Co-authored-by: Zach H <zahalpern+github@gmail.com>

libcockatrice_network/libcockatrice/network/server/remote/game/server_game.cpp

@@ -340,6 +340,7 @@ void Server_Game::doStartGameIfReady(bool forceStartGame)
         }
     }
 
+    players = getPlayers(); // players could have been kicked, get new list of players
     for (Server_AbstractPlayer *player : players.values()) {
         player->setupZones();
     }