Don't rely on include_path to include files.

Always use dirname() or, once available, ABSPATH.

props ketwaroo, hakre.
fixes #17092.

Built from https://develop.svn.wordpress.org/trunk@25616


git-svn-id: http://core.svn.wordpress.org/trunk@25533 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/media-upload.php

@@ -13,7 +13,7 @@ if ( ! isset( $_GET['inline'] ) )
 	define( 'IFRAME_REQUEST' , true );
 
 /** Load WordPress Administration Bootstrap */
-require_once('./admin.php');
+require_once( dirname( __FILE__ ) . '/admin.php' );
 
 if (!current_user_can('upload_files'))
 	wp_die(__('You do not have permission to upload files.'));