Fix: Regression, so introduce option to restore old behaviour.

htdocs/user/class/usergroup.class.php

@@ -178,9 +178,10 @@ class UserGroup extends CommonObject
 	 * 	Return array of users id for group this->id (or all if this->id not defined)
 	 *
 	 * 	@param	string	$excludefilter		Filter to exclude
+	 *  @param	int		$mode				0=Return array of user instance, 1=Return array of users id only
 	 * 	@return	array 						Array of users
 	 */
-	function listUsersForGroup($excludefilter='')
+	function listUsersForGroup($excludefilter='', $mode=0)
 	{
 		global $conf, $user;
 
@@ -210,12 +211,16 @@ class UserGroup extends CommonObject
 			while ($obj = $this->db->fetch_object($resql))
 			{
 				if (! array_key_exists($obj->rowid, $ret))
+				{
+					if ($mode != 1)
 					{
 						$newuser=new User($this->db);
 						$newuser->fetch($obj->rowid);
 						$ret[$obj->rowid]=$newuser;
 					}
-				if (! empty($obj->usergroup_entity))
+					else $ret[$obj->rowid]=$obj->rowid;
+				}
+				if ($mode != 1 && ! empty($obj->usergroup_entity))
 				{
 					$ret[$obj->rowid]->usergroup_entity[]=$obj->usergroup_entity;
 				}