fd_set readfds;
int ssh_sftp_loop_iteration(void){    fd_set readfds;    if (sftp_ssh_socket == INVALID_SOCKET)	return -1;		       /* doom */    FD_ZERO(&readfds);    FD_SET(sftp_ssh_socket, &readfds);    if (p_select(1, &readfds, NULL, NULL, NULL) < 0)	return -1;		       /* doom */    select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ);    return 0;}