check for source cache

diff --git a/apps/files_sharing/lib/cache.php b/apps/files_sharing/lib/cache.php
index e9b2addea388e4e2089e9df2db9c161fe6fffc4c..187d3f38afcc7dc981c60d5cde2916c2c49a1ab2 100644 (file)
--- a/apps/files_sharing/lib/cache.php
+++ b/apps/files_sharing/lib/cache.php
@@ -416,7 +416,9 @@ class Shared_Cache extends Cache {
                        // bubble up to source cache
                        $sourceCache = $this->getSourceCache($path);
                        $parent = dirname($this->files[$path]);
-                       $sourceCache->correctFolderSize($parent);
+                       if ($sourceCache) {
+                               $sourceCache->correctFolderSize($parent);
+                       }
                }
        }