General: Cast $max_depth and $depth to an integer in the Walker class.

This ensures that the arguments are correctly interpreted when passed as a query string, i.e. when `wp_parse_args()` is involved. For example, `wp_list_pages( 'depth=0' )` should display a list of all pages to the maximum depth.

Follow-up to [57848].

Props freibergergarcia, peterwilsoncc, ahortin.
Fixes #61749.
Built from https://develop.svn.wordpress.org/trunk@58812


git-svn-id: http://core.svn.wordpress.org/trunk@58208 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.7-alpha-58811';
+$wp_version = '6.7-alpha-58812';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.