Ticket #19848: is_main_site1.diff

wp-includes/functions.php

@@ -3108 +3108 @@
         if ( !$blog_id )
                 $blog_id = $current_blog->blog_id;
 
-        return $blog_id == $current_site->blog_id;
+        return $blog_id == $current_site->id;
 }
 
 /**