Docs: Clarify the return description for `wp_create_user()` to illustrate that a `WP_Error` object will be returned on failure.

Props jmayhak
Fixes #33321.

Built from https://develop.svn.wordpress.org/trunk@33725


git-svn-id: http://core.svn.wordpress.org/trunk@33693 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/user.php

@@ -2365,7 +2365,8 @@ All at ###SITENAME###
  * @param string $username The user's username.
  * @param string $password The user's password.
  * @param string $email    Optional. The user's email. Default empty.
- * @return int|WP_Error The new user's ID.
+ * @return int|WP_Error The newly created user's ID or a WP_Error object if the user could not
+ *                      be created.
  */
 function wp_create_user($username, $password, $email = '') {
 	$user_login = wp_slash( $username );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-33724';
+$wp_version = '4.4-alpha-33725';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.