This reduces CheckLand ~5.5% on average over prior making the overall reduction ~77.4% instead of ~81.9%. It does skip centre pixel in odd w/h, but that really shouldn't matter much in this case. Can alter if any objects are noticeably off.

/*
 * Copyright (C) 2008 Remko Troncon
 */

#ifndef AUTOUPDATER_H
#define AUTOUPDATER_H

class AutoUpdater
{
    public:
        virtual ~AutoUpdater();

        virtual void checkForUpdates() = 0;
};

#endif