Fix undefined offset warning when using '/' as external storage root

Signed-off-by: Robin Appelman <robin@icewind.nl>

diff --git a/apps/files_external/lib/Lib/Api.php b/apps/files_external/lib/Lib/Api.php
index 82dd377cd1666e40f1c2c72ae981ab7869a5184d..6b10443bbdcabeec2014516af817b14c2d3abbac 100644 (file)
--- a/apps/files_external/lib/Lib/Api.php
+++ b/apps/files_external/lib/Lib/Api.php
@@ -39,7 +39,7 @@ class Api {
        private static function formatMount($mountPoint, $mountConfig) {
                // strip "/$user/files" from mount point
                $mountPoint = explode('/', trim($mountPoint, '/'), 3);
-               $mountPoint = $mountPoint[2];
+               $mountPoint = isset($mountPoint[2]) ? $mountPoint[2] : '';
 
                // split path from mount point
                $path = dirname($mountPoint);