Multiple Key Value for custom validation provide by hook_webform_validation_validate

My custom component is a table, one of cell is input field. It has nothing to do with the compound component of multiple form (multi step form), just simple component, but this component can have to much values.

after form was submitted, drupal showing a error

but, it is wrong. field that contains the values ​​for the item2 should not be highlighted as an error

so this patch allows to highlight a field that is a name like this
submitted[orders][MULTI_FIELD_ID]

P.S. "webform_submitted_data" database table has field "no" for save multi values, but anyother component did not use it for highlighted element of form, now.

You are right. I'm using it in my some projects. I'm contributing one of this (link for example Webform Orders)

You may think that it is my local problem, but it is not right.
Webform using a multiple values. For example, a data field using multi value also.

we can see on this is screen what a day field is filled correctly, but it is marked as wrong, so only month and year fields should be to marked

this patch allow make a validation a more clearly, like screen

Example of validator

/**
 * Implements hook_webform_validation_validate().
 */
function webform_validation_webform_validation_validate($validator_name, $items, $components, $rule) {

....

      case 'date_requared':
        foreach ($items as $key => $item) {
          foreach ($item as $type => $value) {
            if(!is_numeric($value) || empty($value)){
              $error = t('%item can be nummeric', array('%item' => $type));
              $errors[$key][$type] = $error;
            }
          }
        }

        return $errors;

  ....

}

P.S. I wrote this validator is very fast, only to show the principle of the patch)