add_filter('frm_validate_entry', 'fc_validateSave', 20, 2);
function fc_validateSave($errors, $values){
	if ($values['form_id'] == ) {
		// if it's a draft, no need for errors
		$is_draft = $_POST['item_meta'][FrmField::get_id_by_key('is_draft')];
	  	if ($is_draft == "Yes") {
		  	return array();
	  	}
	}
	return $errors;
}