only get real q850 cause codes

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@564 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/freetdm/mod_openzap/mod_openzap.c

@@ -438,7 +438,7 @@ static switch_status_t channel_on_hangup(switch_core_session_t *session)
 	case ZAP_CHAN_TYPE_B:
 		{
 			if (tech_pvt->zchan->state != ZAP_CHANNEL_STATE_DOWN && tech_pvt->zchan->state != ZAP_CHANNEL_STATE_TERMINATING) {
-				tech_pvt->zchan->caller_data.hangup_cause = switch_channel_get_cause(channel);
+				tech_pvt->zchan->caller_data.hangup_cause = switch_channel_get_cause_q850(channel);
 				if (tech_pvt->zchan->caller_data.hangup_cause < 1 || tech_pvt->zchan->caller_data.hangup_cause > 127) {
 					tech_pvt->zchan->caller_data.hangup_cause = ZAP_CAUSE_DESTINATION_OUT_OF_ORDER;
 				}