http_negotiate_sspi: added missing data variable

CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,

                              const char *header)

{

  struct SessionHandle *data = conn->data;

  BYTE              *input_token = NULL;

  SecBufferDesc     out_buff_desc;

  SecBuffer         out_sec_buff;

  if(proxy) {

    userp = conn->proxyuser;

    passwdp = conn->proxypasswd;

    neg_ctx = &conn->data->state.proxyneg;

    neg_ctx = &data->state.proxyneg;

  }

  else {

    userp = conn->user;

    passwdp = conn->passwd;

    neg_ctx = &conn->data->state.negotiate;

    neg_ctx = &data->state.negotiate;

  }

  /* Not set means empty */

    /* We finished successfully our part of authentication, but server

     * rejected it (since we're again here). Exit with an error since we

     * can't invent anything better */

    Curl_cleanup_negotiate(conn->data);

    Curl_cleanup_negotiate(data);

    return CURLE_LOGIN_DENIED;

  }

      return result;

    if(!input_token_len) {

      infof(conn->data,

      infof(data,

            "Negotiate handshake failure (empty challenge message)\n");

      return CURLE_BAD_CONTENT_ENCODING;