Merge branch 'CIVICRM-2225' into 'master'

Fixes PHP Fatal error when editing a Group which has at least 1 Parent Group

See merge request !8

multisite.php

@@ -525,7 +525,7 @@ function _multisite_alter_form_crm_group_form_edit($formName, &$form) {
   if (isset($form->_defaultValues['parents'])) {
     $parentOrgs = civicrm_api('group_organization', 'get', [
       'version' => 3,
-      'group_id' => $form->_defaultValues['parents'],
+      'group_id' => ['IN' => $form->_defaultValues['parents']],
       'return' => 'organization_id',
       'sequential' => 1,
     ]);