Docs: Add missing parameter and return descriptions for `Walker::get_number_of_root_elements()`.

Fixes #33662.

Built from https://develop.svn.wordpress.org/trunk@34121


git-svn-id: http://core.svn.wordpress.org/trunk@34089 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-walker.php

@@ -387,8 +387,8 @@ class Walker {
 	 * @since 2.7.0
 	 * @access public
 	 * 
-	 * @param array $elements
-	 * @return int
+	 * @param array $elements Elements to list.
+	 * @return int Number of root elements.
 	 */
 	public function get_number_of_root_elements( $elements ){
 		$num = 0;

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34117';
+$wp_version = '4.4-alpha-34121';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.