Coding Standards: Cast wp_count_terms() result to int before using in ceil().

This addresses two instances of the (numeric string) return value from `wp_count_terms()` being used directly in `ceil()`, which expects an `int|float`.

Affected methods:
* `WP_Sitemaps_Taxonomies::get_max_num_pages()`
* `wp_nav_menu_item_taxonomy_meta_box()`

Reference: [https://www.php.net/manual/en/function.ceil.php PHP Manual: ceil()].

Follow-up to [14248], [14291], [14569], [14943], [48072], [57648].

Props justlevine.
See #52217.

git-svn-id: https://develop.svn.wordpress.org/trunk@59462 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-admin/includes/nav-menu.php

@@ -875,7 +875,7 @@ function wp_nav_menu_item_taxonomy_meta_box( $data_object, $box ) {
 	}
 
 	$num_pages = (int) ceil(
-		wp_count_terms(
+		(int) wp_count_terms(
 			array_merge(
 				$args,
 				array(

src/wp-includes/sitemaps/providers/class-wp-sitemaps-taxonomies.php

@@ -171,7 +171,7 @@ public function get_max_num_pages( $object_subtype = '' ) {
 
 		$term_count = wp_count_terms( $this->get_taxonomies_query_args( $taxonomy ) );
 
-		return (int) ceil( $term_count / wp_sitemaps_get_max_urls( $this->object_type ) );
+		return (int) ceil( (int) $term_count / wp_sitemaps_get_max_urls( $this->object_type ) );
 	}
 
 	/**