mb_strlen expecting string as argument, got array

There seems to be a bit of a logical error in function views_savedsearches_save_search_form when assembling the redirect query string, in that each $v is assumed to be either a string or empty. In fact, for filters I'm using in my view, $v is quite often an array. So, I modified the code in this section as follows to account for that:

    if ( drupal_strlen($k) > 0 ) {
      if ( is_array($v) && !empty($v) ) {
        foreach( $v as $choice ) {
          if ( drupal_strlen($choice) > 0 ) {
            $query[] = $k . '=' . $choice;
          }
        }
      }
      elseif ( drupal_strlen($v) > 0 ) {
        $query[] = $k .'='. $v;
      }
    }
    elsif ( drupal_strlen($v) > 0 ) {
      $query[]= $v;
    }
    
  }

I've attached a patch for this.