Error in function validation 'is_valid_date'

There is an error validation in is_valid_date function, in /modules/date.php

The variable format is comming like ‘dd/mm/yy’, but the code is doing a strtotime without convertion to database format ‘yy-mm-dd’.

To solve it, I changed the code:

if (! empty($value) && ! self::is_valid_date($value)) {
			$result['valid'] = false;
			$result['reason'][$name] = wpcf7_get_message('invalid_date');
		}

to:

$value = explode("/",$value);
$value = $value[2]."-".$value[1]."-".$value[0];

if (! empty($value) && ! wpcf7_is_date($value)) {
  $result['valid'] = false;
  $result['reason'][$name] = wpcf7_get_message('invalid_date');
}

http://wordpress.org/plugins/contact-form-7-datepicker/