Handle ::find(NULL) on Group and User models.

application/modules/auth/models/GroupModel.php

@@ -64,10 +64,8 @@ class Auth_GroupModel extends Unl_Model
      */
 	static public function findByUser($user, $implicitMemberships = true)
 	{
-        if (Unl_Util::isArray($user) && count($user) == 0) {
+        if ((Unl_Util::isArray($user) && count($user) == 0) || $user === NULL) {
             return new Unl_Model_Collection(__CLASS__);
-        } else if ($user === NULL) {
-            return null;
         }
         
 		$db = Zend_Registry::get('db');
@@ -147,10 +145,8 @@ class Auth_GroupModel extends Unl_Model
      */
     static public function findByChildGroup($group, $impliedMemberships = true)
     {
-        if (Unl_Util::isArray($group) && count($group) == 0) {
+        if ((Unl_Util::isArray($group) && count($group) == 0) || $group === NULL) {
             return new Unl_Model_Collection(__CLASS__);
-        } else if ($group === NULL) {
-            return null;
         }
         
         $db = Zend_Registry::get('db');
@@ -207,10 +203,8 @@ class Auth_GroupModel extends Unl_Model
      */
     static public function findByParentGroup($group, $impliedMemberships = true, $primaryGroups = false)
     {
-        if (Unl_Util::isArray($group) && count($group) == 0) {
+        if ((Unl_Util::isArray($id) && count($id) == 0) || $group === NULL) {
             return new Unl_Model_Collection(__CLASS__);
-        } else if ($group === NULL) {
-            return null;
         }
         
         $db = Zend_Registry::get('db');

application/modules/auth/models/UserModel.php

@@ -107,10 +107,8 @@ class Auth_UserModel extends Unl_Model {
      */
     static public function findByParentGroup($group, $impliedMemberships = true)
     {
-        if (Unl_Util::isArray($group) && count($group) == 0) {
+        if ((Unl_Util::isArray($group) && count($group) == 0) || $group === NULL) {
             return new Unl_Model_Collection(__CLASS__);
-        } else if ($group === NULL) {
-            return null;
         }
         
         $db = Zend_Registry::get('db');