upgrade: PER related changes

diff --git a/libasn1fix/asn1fix_retrieve.c b/libasn1fix/asn1fix_retrieve.c
index 730c861..4236858 100644
--- a/libasn1fix/asn1fix_retrieve.c
+++ b/libasn1fix/asn1fix_retrieve.c
@@ -370,6 +370,7 @@
 		return NULL;
 	}
 
+	tc->_type_referenced = 1;
 	tc->_mark |= TM_RECURSION;
 	WITH_MODULE(tc->module,
 		expr = asn1f_find_terminal_thing(arg, tc, what));