Editor: Prevent direct access to /wp-includes/blocks/index.php.

Adds a check for `ABSPATH` to the top of the `/wp-includes/blocks/index.php` file and prevents the file from loading if it is not defined.

This prevents the file from throwing errors when accessed directly.

Props khokansardar, mukesh27.
Fixes #62108.
See #60352.


git-svn-id: https://develop.svn.wordpress.org/trunk@59117 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/blocks/index.php

@@ -5,6 +5,11 @@
  * @package WordPress
  */
 
+// Don't load directly.
+if ( ! defined( 'ABSPATH' ) ) {
+	die( '-1' );
+}
+
 define( 'BLOCKS_PATH', ABSPATH . WPINC . '/blocks/' );
 
 // Include files required for core blocks registration.