Log error message received from telegram instead of generic

[Nachtalb]

Telegram returns helpful error messages. Show these to the developer so that he knows what the problem is.

Here is an example:

void echo_photo_as_document(telebot_handler_t handle, telebot_update_t update) {
  telebot_error_e   ret;
  telebot_message_t message = update.message;

  telebot_photo_t photo = message.photos[message.count_photos - 1];

  char *caption;
  asprintf(&caption, "width: %d, height: %d, file_size: %d", photo.width,
           photo.height, photo.file_size);

  ret = telebot_send_document(handle, message.chat->id, photo.file_id, false, NULL,
                              caption, "HTML", false, 0, "");

  free(caption);

  if (ret != TELEBOT_ERROR_NONE) {
    printf("Failed to send message: %d \n", ret);
  }
}

This would now return:

[ERROR][telebot_core_curl_perform:145]HTTP error: 400 - "Bad Request: can't use file of type Photo as Document"