Link field's title property is not used

I'm doing a D6 to D7 migration and one of the fields being migrated is a link field. The link module provides the necessary arguments to be able to get results for both link title and attributes. The D6 link module holds these in two columns in the table. When getSourceValues() runs to build up the field result set it mistakenly sees anything with the ":title" argument as a file field and therefore expects the :title to be a serialized array, unserialised into $data['title']. The following bit of code is expecting $data['title']:

elseif ($display_name == "$field_name:title") {
  $row->{$index}[] = $data['title'];
}

I'm not sure what the solution to this issue is. Maybe:

elseif ($display_name == "$field_name:title") {
  if (isset($data['title'])) {
    $row->{$index}[] = $data['title'];
  }
  else {
    $row->{$index}[] = $field_row->$column_name;
  }
}

Thoughts?