add fclose, fixes issue from bdb96b9af85256f9b3f8663ccf6d27b3d1330918

diff --git a/lib/private/preview.php b/lib/private/preview.php
index b0d91fd56801e96d0b6a08bf892fc4c2a58a5c64..74051fbc2a3dab8d772e8ce81fcff879986aa960 100755 (executable)
--- a/lib/private/preview.php
+++ b/lib/private/preview.php
@@ -408,6 +408,7 @@ class Preview {
                        $image->loadFromFileHandle($stream);
                        $this->preview = $image->valid() ? $image : null;
                        $this->resizeAndCrop();
+                       fclose($stream);
                }
 
                if (is_null($this->preview)) {