fix(caldav): avoid selecting every custom properties from table if we have no calendars to filter

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

Author: tcitworld

apps/dav/lib/Db/PropertyMapper.php

@@ -45,6 +45,7 @@ public function findPropertyByPathAndName(string $userId, string $path, string $
 	 * @throws \OCP\DB\Exception
 	 */
 	public function findPropertiesByPathsAndUsers(array $calendars): array {
+		if (empty($calendars)) return [];
 		$selectQb = $this->db->getQueryBuilder();
 		$selectQb->select('*')
 			->from(self::TABLE_NAME);