fixed: warning in client

Author: FranciscaOrtegaG

src/client.rs

@@ -104,7 +104,7 @@ impl <T: ClientConnection> Client<T> {
 
         let client_query = self.get_dns_query();
         let conn: &T = &self.get_conn();
-        let ip_addr = conn.get_ip();
+        let _ip_addr = conn.get_ip();
 
        let dns_response: DnsMessage = match conn.send(client_query) {
             Ok(response_message) => {