Ticket #10467: parent_theme_root.patch

wp-includes/theme.php

@@ -348 +348 @@
                 }
 
                 $template = trim($template);
+                $theme_root = apply_filters( 'parent_theme_root_' . $template, $theme_root );
 
                 if ( !file_exists("$theme_root/$template/index.php") ) {
                         $parent_dir = dirname(dirname($theme_file));