Address Robert's feedback

@@ -40,13 +40,13 @@
 boolean_t name_empty(const name_t *);
 boolean_t name_add(name_t *, const char *, size_t, const char *, size_t);
 boolean_t name_add_str(name_t *, str_t *, str_t *);
 boolean_t name_join(name_t *, size_t, const char *);
 boolean_t name_fmt(name_t *, const char *, const char *);
-str_pair_t *name_at(name_t *, size_t);
+str_pair_t *name_at(const name_t *, size_t);
 str_pair_t *name_top(name_t *);
-str_pair_t *name_pop(name_t *, str_pair_t *);
+void name_pop(name_t *, str_pair_t *);
 
 typedef struct sub_s {
         name_t          *sub_items;
         sysdem_ops_t    *sub_ops;
         size_t          sub_len;