fix(net): Add missing IPv6 guard for GOT_IP6

Author: me-no-dev

Diff for: libraries/Network/src/NetworkInterface.cpp

@@ -106,6 +106,7 @@ void NetworkInterface::_onIpEvent(int32_t event_id, void *event_data) {
     } else if (_interface_id >= ESP_NETIF_ID_ETH && _interface_id < ESP_NETIF_ID_MAX) {
       arduino_event.event_id = ARDUINO_EVENT_ETH_LOST_IP;
     }
+#if CONFIG_LWIP_IPV6
   } else if (event_id == IP_EVENT_GOT_IP6) {
     ip_event_got_ip6_t *event = (ip_event_got_ip6_t *)event_data;
     esp_ip6_addr_type_t addr_type = esp_netif_ip6_get_addr_type(&event->ip6_info.ip);
@@ -134,6 +135,7 @@ void NetworkInterface::_onIpEvent(int32_t event_id, void *event_data) {
     } else if (_interface_id >= ESP_NETIF_ID_ETH && _interface_id < ESP_NETIF_ID_MAX) {
       arduino_event.event_id = ARDUINO_EVENT_ETH_GOT_IP6;
     }
+#endif /* CONFIG_LWIP_IPV6 */
 #if SOC_WIFI_SUPPORTED
   } else if (event_id == IP_EVENT_AP_STAIPASSIGNED && _interface_id == ESP_NETIF_ID_AP) {
     setStatusBits(ESP_NETIF_HAS_IP_BIT);