Convert cpio to use memiter.
diff --git a/inc/memiter.h b/inc/memiter.h
index ffaa822..9e066da 100644
--- a/inc/memiter.h
+++ b/inc/memiter.h
@@ -14,5 +14,6 @@
 bool memiter_parse_uint(struct memiter *it, uint64_t *value);
 bool memiter_parse_str(struct memiter *it, struct memiter *str);
 bool memiter_iseq(const struct memiter *it, const char *str);
+bool memiter_advance(struct memiter *it, size_t v);
 
 #endif /* _MEMITER_H */