Ticket #12349: check-already-existsing-slug-even-if-empty.diff

wp-includes/taxonomy.php

@@ -1480 +1480 @@
 
         if ( empty($slug) )
                 $slug = sanitize_title($name);
-        elseif ( is_term($slug) ) // Provided slug issue.
+        
+        if ( is_term($slug) ) // Provided slug issue.
                 return new WP_Error('term_slug_exists', __('A Term with the slug provided already exists.'));
 
         $term_group = 0;