security.c: Remove out_buffer as it was never written into.

Curl_sec_fflush_fd(struct connectdata *conn, int fd)

{

  if(conn->data_prot != prot_clear) {

    if(conn->out_buffer.index > 0){

      sec_write(conn, fd, conn->out_buffer.data, conn->out_buffer.index);

      conn->out_buffer.index = 0;

    }

    sec_send(conn, fd, NULL, 0);

  }

  return 0;

  enum protection_level data_prot;

  enum protection_level request_data_prot;

  size_t buffer_size;

  struct krb4buffer in_buffer, out_buffer;

  struct krb4buffer in_buffer;

  void *app_data;

  const struct Curl_sec_client_mech *mech;

  struct sockaddr_in local_addr;