msc fix log typo

Change-Id: Id6767c5e7f00ad7e44c569dcba1a56e2717d2e1a
diff --git a/msc/MSC_Tests.ttcn b/msc/MSC_Tests.ttcn
index 36fe1eb..a571fc0 100644
--- a/msc/MSC_Tests.ttcn
+++ b/msc/MSC_Tests.ttcn
@@ -1816,7 +1816,7 @@
 		}
 	[] MNCC.receive(tr_MNCC_DISC_ind(cpars.mncc_callref)) {
 		MNCC.send(ts_MNCC_REL_req(cpars.mncc_callref, valueof(ts_MNCC_cause(23))));
-		log("Rx MNCC DISC.ind, T310.read yelds ", T310.read);
+		log("Rx MNCC DISC.ind, T310.read yields ", T310.read);
 		setverdict(pass);
 		}
 	[] MNCC.receive(MNCC_PDU:?) -> value mncc_rx {