new constraints model

diff --git a/skeletons/UniversalString.c b/skeletons/UniversalString.c
index 241fe67..628ed0c 100644
--- a/skeletons/UniversalString.c
+++ b/skeletons/UniversalString.c
@@ -23,6 +23,7 @@
 	  / sizeof(asn1_DEF_UniversalString_tags[0]),
 	1,	/* Single UNIVERSAL tag may be implicitly overriden */
 	-1,	/* Both ways are fine */
+	0, 0,	/* No members */
 	0	/* No specifics */
 };