Integration with date_popup module

Hi,

I've come across an edge-case bug when using clientside_validation_form with #date_popup fields.

To reproduce:
1. add a date_popup field to a form
2. add clientside_validation_form validation to that form
3. in the field settings, remove the hour, minute and second parts from being collected (i.e. JUST collect a date - year/month/day)

clientside_validation_form will throw a E_NOTICE of:

Notice: Undefined index: #name in clientside_validation_regular() (line 194 of {drupal}/sites/all/modules/contrib/clientside_validation/clientside_validation_form/clientside_validation_form.module).
Notice: Undefined index: #title in clientside_validation_regular() (line 194 of {drupal}/sites/all/modules/contrib/clientside_validation/clientside_validation_form/clientside_validation_form.module).

This error is caused in:

case 'date_popup':
        if (isset($element['date'])) {
          if ($element['#required']) {
            _clientside_validation_set_required($element['date']['#name'], $element['date']['#title'], $element['#required'], $js_rules);
          }
          $format = date_popup_date_format($element);
          _clientside_validation_set_date($element['date']['#name'], $element['date']['#title'], $format, $js_rules);
        }
        if (isset($element['time'])) {
          // error caused on this line:
          if ($element['#required']) {
            // error thrown in this line:
            _clientside_validation_set_required($element['time']['#name'], $element['time']['#title'], $element['#required'], $js_rules);
          }
        }
        break;

When the ['time'] parts are not set, the $element['time'] is an array with ~10 elements (rather than ~27) BUT -- it is stil set. It doesn't have a #name or a #title, as they're not being output, but it does have a #required:false. The isset in line #192 should be checking for $element['time']['#required'] - presumably this is the same if only outputting date fields - not checked that one explicitly though.

One custom fix would be a hook_date_popup_process_alter such as:

function hook_date_popup_process_alter(&$element, &$form_state, $context) {
  if(empty($element['time'])) {
    unset($element['time']);
  }
}

The better solution is to change the isset to check the $element['time']['#required'], as per attached patch.

Thanks!