Ticket #21150: delete_term.patch

wordpress/wp-includes/taxonomy.php

@@ -1759 +1759 @@
                 if ( $defaults['default'] == $term )
                         return 0; // Don't delete the default category
         }
+        elseif ( apply_filters( 'wp_default_term_' . $taxonomy, false, $term ) )
+                return 0; // Don't delete the default term
 
         $args = wp_parse_args($args, $defaults);
         extract($args, EXTR_SKIP);