Call the proper function

* Fix for #6967

core/ajax/share.php

@@ -248,7 +248,7 @@ if (isset($_POST['action']) && isset($_POST['itemType']) && isset($_POST['itemSo
 				while ($count < 15 && count($users) == $limit) {
 					$limit = 15 - $count;
 					if ($shareWithinGroupOnly) {
-						$users = OC_Group::DisplayNamesInGroups($usergroups, (string)$_GET['search'], $limit, $offset);
+						$users = OC_Group::displayNamesInGroups($usergroups, (string)$_GET['search'], $limit, $offset);
 					} else {
 						$users = OC_User::getDisplayNames((string)$_GET['search'], $limit, $offset);
 					}