fix(LDAP): escape DN on check-user

the DN has to be escaped differently when used as a base and we were
missing it here in the search method call in the check-user command.

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

apps/user_ldap/lib/Command/CheckUser.php

@@ -144,7 +144,8 @@ class CheckUser extends Command {
 			$attrs = $access->userManager->getAttributes();
 			$user = $access->userManager->get($uid);
 			$avatarAttributes = $access->getConnection()->resolveRule('avatar');
-			$result = $access->search('objectclass=*', $user->getDN(), $attrs, 1, 0);
+			$baseDn = $this->helper->DNasBaseParameter($user->getDN());
+			$result = $access->search('objectclass=*', $baseDn, $attrs, 1, 0);
 			foreach ($result[0] as $attribute => $valueSet) {
 				$output->writeln('  ' . $attribute . ': ');
 				foreach ($valueSet as $value) {