fix typo

diff --git a/lib/preview.php b/lib/preview.php
index 94e0cd96e7c51ee83a15a60f9c1341dbb584a296..5b2ee2cddd443f4ae69b42766f5cd5be74727248 100755 (executable)
--- a/lib/preview.php
+++ b/lib/preview.php
@@ -659,7 +659,7 @@ class Preview {
                $sharedfile = null;
 
                if($linkedItem['item_type'] === 'folder') {
-                       $isvalid = \OC\File\Filesystem::isValidPath($file);
+                       $isvalid = \OC\Files\Filesystem::isValidPath($file);
                        if(!$isvalid) {
                                \OC_Response::setStatus(400); //400 Bad Request
                                \OC_Log::write('core-preview', 'Passed filename is not valid, might be malicious (file:"' . $file . '";ip:"' . $_SERVER['REMOTE_ADDR'] . '")', \OC_Log::WARN);