From 340ce958d9930a678d60292388636420030ad77c Mon Sep 17 00:00:00 2001
From: Renato Botelho <garga@FreeBSD.org>
Date: Thu, 13 Nov 2014 09:10:44 -0200
Subject: [PATCH] Add an extra protection to avoid having an empty group
 created

---
 etc/inc/auth.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/etc/inc/auth.inc b/etc/inc/auth.inc
index 914b18f5c..8baf89cd6 100644
--- a/etc/inc/auth.inc
+++ b/etc/inc/auth.inc
@@ -574,7 +574,7 @@ function local_user_set_groups($user, $new_groups = NULL ) {
 
 	/* determine which memberships to add */
 	foreach ($new_groups as $groupname) {
-		if (in_array($groupname,$cur_groups))
+		if ($groupname == '' || in_array($groupname,$cur_groups))
 			continue;
 		$group = & $config['system']['group'][$groupindex[$groupname]];
 		$group['member'][] = $user['uid'];