removed order dependency in DEFAULT references

diff --git a/libasn1fix/asn1fix_derefv.h b/libasn1fix/asn1fix_derefv.h
index 9315385..3964f53 100644
--- a/libasn1fix/asn1fix_derefv.h
+++ b/libasn1fix/asn1fix_derefv.h
@@ -3,4 +3,6 @@
 
 int asn1f_fix_dereference_values(arg_t *);
 
+int asn1f_fix_dereference_defaults(arg_t *);
+
 #endif	/* _ASN1FIX_DEREFV_H_ */