Fix incorrect topic-alias property value in mosquitto_sub json output.

ChangeLog.txt

@@ -6,6 +6,10 @@ Broker:
 - Fix std* files not being redirected when daemonising, when built with
   assertions removed. Closes #2708.
 
+Clients:
+- Fix incorrect topic-alias property value in mosquitto_sub json output.
+
+
 2.0.15 - 2022-08-16
 ===================
 

client/sub_client_output.c

@@ -210,7 +210,7 @@ static int json_print_properties(cJSON *root, const mosquitto_property *properti
 				break;
 
 			case MQTT_PROP_TOPIC_ALIAS:
-				mosquitto_property_read_int16(prop, MQTT_PROP_MESSAGE_EXPIRY_INTERVAL, &i16value, false);
+				mosquitto_property_read_int16(prop, MQTT_PROP_TOPIC_ALIAS, &i16value, false);
 				tmp = cJSON_CreateNumber(i16value);
 				break;