Fix -Wunused-parameter

examples/BroadcastingEchoServer.cpp

@@ -1,6 +1,6 @@
 #include "App.h"
 
-struct us_listen_socket_t *listen_socket;
+struct us_listen_socket_t *global_listen_socket;
 
 int main() {
     /* ws->getUserData returns one of these */
@@ -25,28 +25,28 @@ int main() {
             /* Exit gracefully if we get a closedown message (ASAN debug) */
             if (message == "closedown") {
                /* Bye bye */
-               us_listen_socket_close(0, listen_socket);
+               us_listen_socket_close(0, global_listen_socket);
                ws->close();
             }
 
             /* Simply broadcast every single message we get */
             ws->publish("broadcast", message, opCode, true);
         },
-        .drain = [](auto *ws) {
+        .drain = [](auto */*ws*/) {
             /* Check getBufferedAmount here */
         },
-        .ping = [](auto *ws) {
+        .ping = [](auto */*ws*/) {
 
         },
-        .pong = [](auto *ws) {
+        .pong = [](auto */*ws*/) {
 
         },
-        .close = [](auto *ws, int code, std::string_view message) {
+        .close = [](auto */*ws*/, int /*code*/, std::string_view /*message*/) {
             /* We automatically unsubscribe from any topic here */
         }
-    }).listen(9001, [](auto *token) {
-        listen_socket = token;
-        if (token) {
+    }).listen(9001, [](auto *listen_socket) {
+        global_listen_socket = listen_socket;
+        if (listen_socket) {
             std::cout << "Listening on port " << 9001 << std::endl;
         }
     }).run();