don't create empty versions

diff --git a/apps/files_versions/lib/versions.php b/apps/files_versions/lib/versions.php
index c083a000c37b21f68b7747ce1bd44bbf17bcd5a4..10d6f7ef421a3ebb444fe14685b47553e11e733e 100644 (file)
--- a/apps/files_versions/lib/versions.php
+++ b/apps/files_versions/lib/versions.php
@@ -101,8 +101,11 @@ class Storage {
                                return false;
                        }
 
-                       // we should have a source file to work with
-                       if (!$files_view->file_exists($filename)) {
+                       // we should have a source file to work with, and the file shouldn't
+                       // be empty
+                       $fileExists = $files_view->file_exists($filename);
+                       $fileSize = $files_view->filesize($filename);
+                       if ($fileExists === false || $fileSize === 0) {
                                return false;
                        }