From 793b46ede3d0a26d04a9cab7fe172443bab55e4f Mon Sep 17 00:00:00 2001
From: Robbie Averill <robbie@silverstripe.com>
Date: Fri, 1 Sep 2017 12:33:16 +1200
Subject: [PATCH] FIX Update i18n::validate_locale for SS4

---
 code/extensions/SiteTreeSubsites.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/code/extensions/SiteTreeSubsites.php b/code/extensions/SiteTreeSubsites.php
index e0fdc66..9bf8e73 100644
--- a/code/extensions/SiteTreeSubsites.php
+++ b/code/extensions/SiteTreeSubsites.php
@@ -14,6 +14,7 @@ use SilverStripe\Forms\DropdownField;
 use SilverStripe\Forms\FieldList;
 use SilverStripe\Forms\FormAction;
 use SilverStripe\Forms\ToggleCompositeField;
+use SilverStripe\i18n\i18n;
 use SilverStripe\ORM\DataExtension;
 use SilverStripe\ORM\DataObject;
 use SilverStripe\ORM\DataQuery;
@@ -341,7 +342,7 @@ class SiteTreeSubsites extends DataExtension
             SSViewer::set_themes(array_merge([$subsite->Theme], SSViewer::get_themes()));
         }
 
-        if ($subsite && i18n::validate_locale($subsite->Language)) {
+        if ($subsite && i18n::getData()->validate($subsite->Language)) {
             i18n::set_locale($subsite->Language);
         }
     }