sip: tweak log msg

Change-Id: Icf8a88306bf08d6e0d2c62f6c09ce89b36a40254
diff --git a/sip/SIP_Tests.ttcn b/sip/SIP_Tests.ttcn
index 37c158e..1e3c43f 100644
--- a/sip/SIP_Tests.ttcn
+++ b/sip/SIP_Tests.ttcn
@@ -212,7 +212,7 @@
 		cp.mncc_call_id := mncc.u.signal.callref;
 		}
 	[] SIP.receive {
-		setverdict(fail, "Received unexpected respose");
+		setverdict(fail, "Received unexpected SIP response");
 		SIP.send(ts_SIP_ACK(cp.comp.sip_call_id, cp.comp.sip_url_ext, cp.comp.sip_url_gsm,
 				    cp.comp.sip_seq_nr, omit));
 		mtc.stop;