From c7fb7fa370f11653673546117314b0cb3c543702 Mon Sep 17 00:00:00 2001
From: Marina Glancy <marina@moodle.com>
Date: Sat, 26 Apr 2014 10:37:37 +0800
Subject: [PATCH] MDL-45280 wrtie default value for
 admin_setting_configstoredfile

this fixes regression from MDL-45134
---
 lib/adminlib.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/adminlib.php b/lib/adminlib.php
index a0fccbab5e7..ac4f6ffa71e 100644
--- a/lib/adminlib.php
+++ b/lib/adminlib.php
@@ -8472,7 +8472,10 @@ class admin_setting_configstoredfile extends admin_setting {
 
         // Let's not deal with validation here, this is for admins only.
         $current = $this->get_setting();
-        if (!is_number($data)) {
+        if (empty($data) && $current === null) {
+            // This will be the case when applying default settings (installation).
+            return ($this->config_write($this->name, '') ? '' : get_string('errorsetting', 'admin'));
+        } else if (!is_number($data)) {
             // Draft item id is expected here!
             return get_string('errorsetting', 'admin');
         }