From 31c60775b63d2ae98ce57f1cbae289a6932b8645 Mon Sep 17 00:00:00 2001
From: Our Air Quality <info@ourairquality.org>
Date: Fri, 8 Dec 2017 12:18:42 +1100
Subject: [PATCH] mdns: silence some unused variable warnings.

---
 src/apps/mdns/mdns.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/apps/mdns/mdns.c b/src/apps/mdns/mdns.c
index 2b049d7e..efb3b0f6 100644
--- a/src/apps/mdns/mdns.c
+++ b/src/apps/mdns/mdns.c
@@ -485,6 +485,8 @@ mdns_build_reverse_v4_domain(struct mdns_domain *domain, const ip4_addr_t *addr)
   int i;
   err_t res;
   const u8_t *ptr;
+
+  LWIP_UNUSED_ARG(res);
   if (!domain || !addr) {
     return ERR_ARG;
   }
@@ -522,6 +524,8 @@ mdns_build_reverse_v6_domain(struct mdns_domain *domain, const ip6_addr_t *addr)
 {
   int i;
   err_t res;
+
+  LWIP_UNUSED_ARG(res);
   const u8_t *ptr;
   if (!domain || !addr) {
     return ERR_ARG;
@@ -559,6 +563,7 @@ static err_t
 mdns_add_dotlocal(struct mdns_domain *domain)
 {
   err_t res = mdns_domain_add_label(domain, TOPDOMAIN_LOCAL, (u8_t)(sizeof(TOPDOMAIN_LOCAL) - 1));
+  LWIP_UNUSED_ARG(res);
   LWIP_ERROR("mdns_add_dotlocal: Failed to add label", (res == ERR_OK), return res);
   return mdns_domain_add_label(domain, NULL, 0);
 }
@@ -573,6 +578,7 @@ static err_t
 mdns_build_host_domain(struct mdns_domain *domain, struct mdns_host *mdns)
 {
   err_t res;
+  LWIP_UNUSED_ARG(res);
   memset(domain, 0, sizeof(struct mdns_domain));
   LWIP_ERROR("mdns_build_host_domain: mdns != NULL", (mdns != NULL), return ERR_VAL);
   res = mdns_domain_add_label(domain, mdns->name, (u8_t)strlen(mdns->name));
@@ -589,6 +595,7 @@ static err_t
 mdns_build_dnssd_domain(struct mdns_domain *domain)
 {
   err_t res;
+  LWIP_UNUSED_ARG(res);
   memset(domain, 0, sizeof(struct mdns_domain));
   res = mdns_domain_add_label(domain, "_services", (u8_t)(sizeof("_services") - 1));
   LWIP_ERROR("mdns_build_dnssd_domain: Failed to add label", (res == ERR_OK), return res);
@@ -612,6 +619,7 @@ static err_t
 mdns_build_service_domain(struct mdns_domain *domain, struct mdns_service *service, int include_name)
 {
   err_t res;
+  LWIP_UNUSED_ARG(res);
   memset(domain, 0, sizeof(struct mdns_domain));
   if (include_name) {
     res = mdns_domain_add_label(domain, service->name, (u8_t)strlen(service->name));