Illegal offset type in isset or empty

Hi there,

I'm receiving the following PHP error when previewing a form which contains autocomplete fields (created with CCK and content_taxonomy):

warning: Illegal offset type in isset or empty in /sites/all/modules/localizer/taxonomy/taxonomy.module on line 1187.
warning: Illegal offset type in /sites/all/modules/localizer/taxonomy/taxonomy.module on line 1188.
warning: Illegal offset type in /sites/all/modules/localizer/taxonomy/taxonomy.module on line 1189.
warning: Illegal offset type in /sites/all/modules/localizer/taxonomy/taxonomy.module on line 1189.
warning: Illegal offset type in /sites/all/modules/localizer/taxonomy/taxonomy.module on line 1192.

I've checked the mentioned lines. $tid in function taxonomy_get_term() is 0. Therefore the performed query and $terms[$tid] are empty. I've changed the function a little bit and now I don't get any PHP error message (but I'm not sure if this is a clean solution):

function taxonomy_get_term($tid) {
  static $terms = array();

  if ($tid[0] != 0) {
    if (!isset($terms[$tid])) {
      $terms[$tid] = db_fetch_object(db_query('SELECT * FROM {term_data} WHERE tid = %d', $tid));
      if (function_exists('to')) $terms[$tid] = to('taxonomy_term', $tid, $terms[$tid]);
    }

    return $terms[$tid];
  }
}

Can anyone confirm and test my changes?!