Taxonomy: Restore the ability to use string-based `$args` in `wp_get_object_terms()`.

Props tyxla.
Fixes #39215

Built from https://develop.svn.wordpress.org/trunk@39578


git-svn-id: http://core.svn.wordpress.org/trunk@39518 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/taxonomy.php

@@ -1877,6 +1877,8 @@ function wp_get_object_terms($object_ids, $taxonomies, $args = array()) {
 		$object_ids = array($object_ids);
 	$object_ids = array_map('intval', $object_ids);
 
+	$args = wp_parse_args( $args );
+
 	$args['taxonomy'] = $taxonomies;
 	$args['object_ids'] = $object_ids;
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39577';
+$wp_version = '4.8-alpha-39578';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.