LibDNS: Use AllocatingMemoryStream in DNS package construction

Author: https://github.com/timschumi
Commit: 87c64834ca
Pull-request: https://github.com/SerenityOS/serenity/pull/16992
Reviewed-by: https://github.com/ADKaster ✅

Userland/Services/LookupServer/DNSServer.cpp

@@ -62,7 +62,7 @@ ErrorOr<void> DNSServer::handle_client()
     else
         response.set_code(Packet::Code::NOERROR);
 
-    buffer = response.to_byte_buffer();
+    buffer = TRY(response.to_byte_buffer());
 
     TRY(send(buffer, client_address));
     return {};