fix(error checking): initialize_player will only continue if the given player id is valid

game_root.cpp

@@ -57,6 +57,8 @@ void GameRoot::player_removed(uint32_t player_id) {
 }
 
 bool GameRoot::initialize_player(IPlayer *player, uint32_t id) {
+    if(!this->players.has(id))
+        return false;
     Pair<PlayerInput*, IPlayer*> &found{this->players.get(id)};
     this->add_child(player->to_node());
     player->player_id = id;