IPA_Types: Add ts_PDU_IPA (selftest fixup

library/IPA_Types.ttcn

@@ -49,6 +49,13 @@ type record PDU_IPA
 	variant (streamIdExt) "PRESENCE(streamId=IPAC_PROTO_OSMO)";
 }
 
+template PDU_IPA ts_PDU_IPA(IpaStreamId id, template octetstring payload) := {
+	lengthInd := 0,
+	streamId := id,
+	streamIdExt := omit,
+	payloadData := valueof(payload)
+}
+
 
 type enumerated IpaCcmMsgtype {
 	IPAC_MSGT_PING		('00'H),