Taxonomy: Increase cache hits in `WP_Term_Query` when using include and exclude parameters.

Ensure that empty values of include and exclude passed to the parameters of `WP_Term_Query`, reused existing caches by 
resetting values to an empty array. 

Props Spacedmonkey, peterwilsoncc, hellofromtonya.
Follow-up to [52970].
See #55352.


Built from https://develop.svn.wordpress.org/trunk@53309


git-svn-id: http://core.svn.wordpress.org/trunk@52898 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-term-query.php

@@ -457,6 +457,14 @@ class WP_Term_Query {
 				"tt.taxonomy IN ('" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "')";
 		}
 
+		if ( empty( $args['exclude'] ) ) {
+			$args['exclude'] = array();
+		}
+
+		if ( empty( $args['include'] ) ) {
+			$args['include'] = array();
+		}
+
 		$exclude      = $args['exclude'];
 		$exclude_tree = $args['exclude_tree'];
 		$include      = $args['include'];

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-beta3-53308';
+$wp_version = '6.0-beta3-53309';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.