MSC_Tests.ttcn: fix: verify the contents of SM-RP-DA/OA for MO/MT SMS

Change-Id: Ib467eeca6439bc6cce72293fbb5bb48f6d233db9
Related: OS#4324
diff --git a/msc/BSC_ConnectionHandler.ttcn b/msc/BSC_ConnectionHandler.ttcn
index 0f48ed6..ccebba1 100644
--- a/msc/BSC_ConnectionHandler.ttcn
+++ b/msc/BSC_ConnectionHandler.ttcn
@@ -1777,7 +1777,7 @@
 
 	/* Expect CP-DATA(RP-DATA(SMS-DELIVER)) */
 	tp_mt := tr_SMS_DELIVER(?, spars.tp.ud, spars.tp.pid, spars.tp.dcs, ?);
-	rp_mt := tr_RP_DATA_MT(?, ?, omit, tp_mt);
+	rp_mt := tr_RP_DATA_MT(?, spars.rp.smsc_addr, omit, tp_mt);
 	l3_mt := tr_ML3_MT_SMS(?, c_TIF_ORIG, tr_CP_DATA_MT(rp_mt));
 	BSSAP.receive(tr_PDU_DTAP_MT(l3_mt, spars.dlci)) -> value dtap_mt;