fix OCA\DAV\CalDAV\CalDavBackend search $options

Signed-off-by: dartcafe <github@dartcafe.de>

apps/dav/lib/CalDAV/CalDavBackend.php

@@ -1553,12 +1553,12 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 		if (isset($options['timerange'])) {
 			if (isset($options['timerange']['start'])) {
 				$outerQuery->andWhere($outerQuery->expr()->gt('lastoccurence',
-					$outerQuery->createNamedParameter($options['timerange']['start']->getTimeStamp)));
+					$outerQuery->createNamedParameter($options['timerange']['start']->getTimeStamp())));
 
 			}
 			if (isset($options['timerange']['end'])) {
 				$outerQuery->andWhere($outerQuery->expr()->lt('firstoccurence',
-					$outerQuery->createNamedParameter($options['timerange']['end']->getTimeStamp)));
+					$outerQuery->createNamedParameter($options['timerange']['end']->getTimeStamp())));
 			}
 		}