URL alias are not created

When the feature is enabled, the new URL alias are not created.

Looking at the code in plugins/path.inc file I've found at line 28:

function path_post_import($node) {
    if(isset($node->nid) && 
       ($path = path_load("node/". $node->nid)) &&
       isset($node->exported_path)
       ) {
      $path['alias'] = $node->exported_path;
      path_save($path);
    }
}

The path is only created when there is a previous one created, for the same source path. It's a nonsense and I thought that must be replaced with something like:

function path_post_import($node) {
  if(isset($node->nid) && isset($node->exported_path)) {
    $path = array(
      'source' => 'node/'.$node->nid,
      'alias' => $node->exported_path,       
    );
    if (isset($node->language)) {
      $path['language'] = $node->language;
    }
    path_save($path);
  }
}