Strange logic in EnclaveMessageExchange.cpp of LocalAttestation sample code

Line 389 of EnclaveMessageExchange.cpp in function `send_request_receive_response` contains the following code:

if(sizeof(resp_message) > max_resp_message_length)
{
SAFE_FREE(req_message);
SAFE_FREE(resp_message);
return INVALID_PARAMETER_ERROR;
}

Here, `resp_message` is a pointer to a `secure_message_t` struct (it's allocated with `malloc` on line 358, a few lines above this snippet) and `max_resp_message_length` is defined as:

max_resp_message_length = sizeof(secure_message_t)+ max_out_buff_size;

(i.e. the same size used in the `malloc` of `resp_message`.)

Is this intended? I'm not sure what is being checked here...