do not store external ASN reader reference in AsnUniversal

Author: Crypt32

Asn1Parser/Universal/Asn1Universal.cs

@@ -84,7 +84,7 @@ protected Asn1Universal(Asn1Reader asn, Asn1Type? type) {
         /// </summary>
         /// <param name="asn">Existing <see cref="Asn1Reader"/> object.</param>
         protected void Initialize(Asn1Reader asn) {
-            asnReader = asn;
+            asnReader = new Asn1Reader(asn); // do not store external ASN reader reference.
             Tag = asn.Tag;
             TagName = asn.TagName;
             IsContainer = asn.IsConstructed;