silence psalm false positive

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

Author: blizzz

apps/user_ldap/lib/Mapping/AbstractMapping.php

@@ -221,6 +221,8 @@ public function getListOfIdsByDn(array $fdns): array {
 			$slice++;
 			$fdnsSlice = array_slice($fdns, $sliceSize * ($slice - 1), $sliceSize);
 
+			/** @see https://github.com/vimeo/psalm/issues/4995 */
+			/** @psalm-suppress TypeDoesNotContainType */
 			if (!isset($qb)) {
 				$qb = $this->prepareListOfIdsQuery($fdnsSlice);
 				continue;