Check if size value is set

Using `isset()` as it does not return true for array keys that correspond to a `null` value, while `array_key_exists()` does.
Fix #29865

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/private/Files/View.php b/lib/private/Files/View.php
index f2d91065b9a..25ea6261a38 100644
--- a/lib/private/Files/View.php
+++ b/lib/private/Files/View.php
@@ -1340,7 +1340,7 @@ class View {
 
 		try {
 			// if the file is not in the cache or needs to be updated, trigger the scanner and reload the data
-			if (!$data || $data['size'] === -1) {
+			if (!$data || isset($data['size']) && $data['size'] === -1) {
 				if (!$storage->file_exists($internalPath)) {
 					return false;
 				}