fix(contacts): only accept single entry uid

Signed-off-by: Maxence Lange <[email protected]>

Author: ArtificialOwl

lib/private/Contacts/ContactsMenu/ContactsStore.php

@@ -328,7 +328,7 @@ public function findOne(IUser $user, int $shareType, string $shareWith): ?IEntry
 	private function contactArrayToEntry(array $contact): Entry {
 		$entry = new Entry();
 
-		if (!empty($contact['UID'])) {
+		if (!empty($contact['UID']) && is_string($contact['UID'])) {
 			$uid = $contact['UID'];
 			$entry->setId($uid);
 			$entry->setProperty('isUser', false);