Do not send back an UPU when receiving a call for on unequipped circuit.

git-svn-id: http://yate.null.ro/svn/yate/trunk@4105 acf43c95-373e-0410-b603-e72c3f656dc1

libs/ysig/layer3.cpp

@@ -1036,6 +1036,7 @@ bool SS7MTP3::receivedMSU(const SS7MSU& msu, SS7Layer2* link, int sls)
     switch (handled) {
 	case HandledMSU::Accepted:
 	case HandledMSU::Failure:
+	case HandledMSU::NoCircuit:
 	    return true;
 	default:
 	    break;

libs/ysig/router.cpp

@@ -884,6 +884,8 @@ HandledMSU SS7Router::receivedMSU(const SS7MSU& msu, const SS7Label& label, SS7L
 	if (!local)
 	    return m_sendProhibited ? HandledMSU::NoAddress : HandledMSU::Failure;
     }
+    if (HandledMSU::NoCircuit == ret)
+	return HandledMSU::NoCircuit;
     return (local && m_sendUnavail) ? HandledMSU::Unequipped : HandledMSU::Failure;
 }