MODE_TREE_PREVIEW_OFF
if (preview == MODE_TREE_PREVIEW_OFF)
case MODE_TREE_PREVIEW_OFF:
mtd->preview = MODE_TREE_PREVIEW_OFF;
if (mtd->preview != MODE_TREE_PREVIEW_OFF)
mtd->preview = MODE_TREE_PREVIEW_OFF;
mtd->preview = MODE_TREE_PREVIEW_OFF;
if (mtd->preview != MODE_TREE_PREVIEW_OFF)
if (mtd->preview == MODE_TREE_PREVIEW_OFF)