Switch hangup cause to NORMAL_CIRCUIT_CONGESTION when no channels are available…

Switch hangup cause to NORMAL_CIRCUIT_CONGESTION when no channels are available so it transates into 'no circuit/channel available [Q.850]'

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@669 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/openzap/mod_openzap/mod_openzap.c

@@ -999,7 +999,7 @@ static switch_call_cause_t channel_outgoing_channel(switch_core_session_t *sessi
 	
 	if (status != ZAP_SUCCESS) {
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "No channels available\n");
-		return SWITCH_CAUSE_DESTINATION_OUT_OF_ORDER;
+		return SWITCH_CAUSE_NORMAL_CIRCUIT_CONGESTION;
 	}
 
 	zap_channel_clear_vars(zchan);