When WordPress is loaded in a function (e.g. unit tests) the variables initialized at the top level aren't globals, but we expect them to be. Explicitly make the version variables global.

Props nbachiyski.
Fixes #23685.



git-svn-id: https://develop.svn.wordpress.org/trunk@26008 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/version.php

@@ -1,4 +1,6 @@
 <?php
+global $wp_version, $wp_db_version, $tinymce_version, $required_php_version, $required_mysql_version;
+
 /**
  * The WordPress version string
  *