For clarity, initialize some arrays that previously were only assigned via short circuit in loops.

See #30799.


git-svn-id: https://develop.svn.wordpress.org/trunk@30982 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/default-widgets.php

@@ -1266,6 +1266,7 @@ class WP_Widget_Tag_Cloud extends WP_Widget {
 	}
 
 	public function update( $new_instance, $old_instance ) {
+		$instance = array();
 		$instance['title'] = strip_tags(stripslashes($new_instance['title']));
 		$instance['taxonomy'] = stripslashes($new_instance['taxonomy']);
 		return $instance;