Fix compile when IPv4 is disabled

src/apps/lwiperf/lwiperf.c

@@ -579,7 +579,7 @@ lwiperf_tcp_accept(void *arg, struct tcp_pcb *newpcb, err_t err)
 void*
 lwiperf_start_tcp_server_default(lwiperf_report_fn report_fn, void* report_arg)
 {
-  return lwiperf_start_tcp_server(IP4_ADDR_ANY, LWIPERF_TCP_PORT_DEFAULT,
+  return lwiperf_start_tcp_server(IP_ADDR_ANY, LWIPERF_TCP_PORT_DEFAULT,
     report_fn, report_arg);
 }
 

src/apps/snmp/snmp_netconn.c

@@ -52,7 +52,7 @@ snmp_netconn_thread(void *arg)
   LWIP_UNUSED_ARG(arg);
   
   /* Bind to SNMP port with default IP address */
- #if LWIP_IPV6
+#if LWIP_IPV6
   conn = netconn_new(NETCONN_UDP_IPV6);
   netconn_bind(conn, IP6_ADDR_ANY, SNMP_IN_PORT);
 #else /* LWIP_IPV6 */

src/apps/sntp/sntp.c

@@ -688,7 +688,7 @@ sntp_getserver(u8_t idx)
   if (idx < SNTP_MAX_SERVERS) {
     return &sntp_servers[idx].addr;
   }
-  return IP4_ADDR_ANY;
+  return IP_ADDR_ANY;
 }
 
 #if SNTP_SERVER_DNS