REPLACE THIS
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function get_thanks_topic_reput($topic_id)
{
    global $max_topic_thanks, $config, $phpbb_root_path, $template, $topic_thanks;
    $template->assign_block_vars('topicrow.reput', array(
        'TOPIC_REPUT'               => $topic_thanks[$topic_id],
        'S_THANKS_TOPIC_REPUT_VIEW' => $config['thanks_topic_reput_view'],
        'S_THANKS_REPUT_GRAPHIC'    => $config['thanks_reput_graphic'],
        'THANKS_REPUT_HEIGHT'       => sprintf('%dpx', $config['thanks_reput_height']),
        'THANKS_REPUT_GRAPHIC_WIDTH'=> sprintf('%dpx', $config['thanks_reput_level']*$config['thanks_reput_height']),
        'THANKS_REPUT_IMAGE'        => ($config['thanks_reput_image']) ? $phpbb_root_path . $config['thanks_reput_image'] : '',
        'THANKS_REPUT_IMAGE_BACK'   => ($config['thanks_reput_image_back']) ? $phpbb_root_path . $config['thanks_reput_image_back'] : '',
    ));
}

WITH THIS
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function get_thanks_topic_reput($topic_id)
if (isset($topic_thanks[$topic_id]))
{
    global $max_topic_thanks, $config, $phpbb_root_path, $template, $topic_thanks;
    $template->assign_block_vars('topicrow.reput', array(
        'TOPIC_REPUT'               => $topic_thanks[$topic_id],
        'S_THANKS_TOPIC_REPUT_VIEW' => $config['thanks_topic_reput_view'],
        'S_THANKS_REPUT_GRAPHIC'    => $config['thanks_reput_graphic'],
        'THANKS_REPUT_HEIGHT'       => sprintf('%dpx', $config['thanks_reput_height']),
        'THANKS_REPUT_GRAPHIC_WIDTH'=> sprintf('%dpx', $config['thanks_reput_level']*$config['thanks_reput_height']),
        'THANKS_REPUT_IMAGE'        => ($config['thanks_reput_image']) ? $phpbb_root_path . $config['thanks_reput_image'] : '',
        'THANKS_REPUT_IMAGE_BACK'   => ($config['thanks_reput_image_back']) ? $phpbb_root_path . $config['thanks_reput_image_back'] : '',
    ));
}
else
{
    global $max_topic_thanks, $config, $phpbb_root_path, $template, $topic_thanks;
    $template->assign_block_vars('topicrow.reput', array(
        'TOPIC_REPUT'               => 0,
        'S_THANKS_TOPIC_REPUT_VIEW' => $config['thanks_topic_reput_view'],
        'S_THANKS_REPUT_GRAPHIC'    => $config['thanks_reput_graphic'],
        'THANKS_REPUT_HEIGHT'       => sprintf('%dpx', $config['thanks_reput_height']),
        'THANKS_REPUT_GRAPHIC_WIDTH'=> sprintf('%dpx', $config['thanks_reput_level']*$config['thanks_reput_height']),
        'THANKS_REPUT_IMAGE'        => ($config['thanks_reput_image']) ? $phpbb_root_path . $config['thanks_reput_image'] : '',
        'THANKS_REPUT_IMAGE_BACK'   => ($config['thanks_reput_image_back']) ? $phpbb_root_path . $config['thanks_reput_image_back'] : '',
    ));
}