[ticket/13542] Update core.ucp_prefs_personal_data to include $error

Update the event so extensions will be able to validate (and deny) changes.

PHPBB3-13542

phpBB/includes/ucp/ucp_prefs.php

@@ -67,9 +67,11 @@ function main($id, $mode)
 				* @var	bool	submit		Do we display the form only
 				*							or did the user press submit
 				* @var	array	data		Array with current ucp options data
+				* @var	array	error		Array with list of errors
 				* @since 3.1.0-a1
+				* @changed 3.1.4-rc1
 				*/
-				$vars = array('submit', 'data');
+				$vars = array('submit', 'data', 'error');
 				extract($phpbb_dispatcher->trigger_event('core.ucp_prefs_personal_data', compact($vars)));
 
 				if ($submit)