introduce oer constraint code
diff --git a/skeletons/PrintableString.c b/skeletons/PrintableString.c
index 48ee751..3360c2d 100644
--- a/skeletons/PrintableString.c
+++ b/skeletons/PrintableString.c
@@ -41,7 +41,7 @@
 		return _PrintableString_code2value[code];
 	return -1;
 }
-static asn_per_constraints_t asn_DEF_PrintableString_constraints = {
+static asn_per_constraints_t asn_DEF_PrintableString_per_constraints = {
 	{ APC_CONSTRAINED, 4, 4, 0x20, 0x39 },	/* Value */
 	{ APC_SEMI_CONSTRAINED, -1, -1, 0, 0 },	/* Size */
 	asn_DEF_PrintableString_v2c,
@@ -78,7 +78,8 @@
 	asn_DEF_PrintableString_tags,
 	sizeof(asn_DEF_PrintableString_tags)
 	  / sizeof(asn_DEF_PrintableString_tags[0]),
-	&asn_DEF_PrintableString_constraints,
+	0,	/* No OER visible constraints */
+	&asn_DEF_PrintableString_per_constraints,
 	0, 0,	/* No members */
 	0	/* No specifics */
 };