 prefer raw_inset_crops[0] </li>
    </ul>
    <p>maxcrop: limits crop to not less than (original width/height)*maxcrop; if
      raw_inset_crops[i] data results in tighter crop, than this item is
      ignored. </p>
    <p>return value: index in raw_inset_crops[] used increased by one, so </p>
    <ul>
      <li>0: no changes made </li>
      <li>1: [0]th data used </li>
      <li>2: [1]th data used </li>
    </ul>
    <p>Note: this call SHOULD be used after LibRaw::unpack(), otherwise black
      level ca