catch error if old filecache table is not present during upgrade

lib/files/cache/upgrade.php

@@ -15,7 +15,11 @@ class Upgrade {
 		$insertQuery = \OC_DB::prepare('INSERT INTO `*PREFIX*filecache`( `fileid`, `storage`, `path`, `path_hash`, `parent`, `name`, `mimetype`, `mimepart`, `size`, `mtime`, `encrypted` )
 			VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)');
 
+		try {
 			$oldEntriesQuery = \OC_DB::prepare('SELECT * FROM `*PREFIX*fscache` ORDER BY `id` ASC'); //sort ascending to ensure the parent gets inserted before a child
+		} catch (\Exception $e) {
+			return;
+		}
 		try {
 			$oldEntriesResult = $oldEntriesQuery->execute();
 		} catch (\Exception $e) {