Help with this function (C++) - cleanTile()

[Nottinghster]

How to make the code do not delete the items, corpses loaded directly from the map?
Only delete the items, corpses placed in game

uint32_t Tile::cleanTile()
{
    uint32_t itemsCleaned = 0;

    if(hasFlag(TILESTATE_HOUSE))
		return itemsCleaned;
	
	if(hasFlag(TILESTATE_PROTECTIONZONE) && !g_config.getBool(ConfigManager::CLEAN_PZ)){
        if(g_game.getGameState() != GAME_STATE_CLOSED || !g_config.getBool(ConfigManager::CLEAN_PZ_SAVE))
            return itemsCleaned;
    }
	
	ItemVector toRemove;
	toRemove.clear();
	
	ItemVector::iterator it = downItems.begin();
	while(it != downItems.end())
	{
        if((*it)->isCleanable())
		{
            toRemove.push_back((*it));
		}
		++it;
	}
	
	it = toRemove.begin();
	while(it != toRemove.end())
	{
		g_game.internalRemoveItem((*it), (*it)->getItemCount());
		++itemsCleaned;
		++it;
	}
	
	return itemsCleaned;
}