Ticket #35057: 35057.diff

src/wp-admin/includes/screen.php

@@ -57 +57 @@
 
         $hidden = get_user_option( 'manage' . $screen->id . 'columnshidden' );
 
-        if ( ! $hidden ) {
+        if ( false === $hidden ) {
                 $hidden = array();
 
                 /**