Ticket #23181: 23181.2.patch

wp-admin/custom-header.php

@@ -1001 +1001 @@
 
                 $default = sprintf( $default, get_template_directory_uri(), get_stylesheet_directory_uri() );
 
+                $default_data = array();
                 foreach ( $this->default_headers as $header => $details ) {
                         if ( $details['url'] == $default ) {
                                 $default_data = $details;