Search chokes on special characters

When comparing searches via views_fastsearch and searches using Drupal core search, there are discrepancies when using terms that have apostrophes and dashes.

For example, searching on "Bill Jo's" or "e-trade" will not yield results in this module, but will show results in core search.

The solution is simple.

      // walk through each of the values
      // building the AND, OR, and exclusion terms
      $values = explode(' ', search_simplify($filter['value']));
      $word_count = 0;
      foreach ($values as $value) {
        if (strlen($value) < variable_get('minimum_word_size', 3)) {
          continue;
        }

The patch above does two things:

- Uses search_simplify() to strip the special characters, and hence the search string will be broken down into words (e.g. e-trade becomes e+trade).

- Skip the terms that are less than the threshold set in Drupal's search.

This patch has been tested at a live site and works well.