rem: if (!cache->mountpoint) return MEDIA_TYPE_ERROR;
context: cd_cache_disc_is_dvd (CdCache *cache,		      GError **error){  if (!cache->mountpoint)    return MEDIA_TYPE_ERROR;  /* open disc, check capabilities and open mount */  if (!cd_cache_open_device (cache, error))    return MEDIA_TYPE_ERROR;  if (!(cache->cap & CDC_DVD))    return MEDIA_TYPE_DATA;  if (!cd_cache_open_mountpoint (cache, error))    return MEDIA_TYPE_ERROR;  if (cd_cache_file_exists (cache, "VIDEO_TS", "VIDEO_TS.IFO"))    return MEDIA_TYPE_DVD;  return MEDIA_TYPE_DATA;}