[smartdown] internal: proper return value from recursive visitor
[smartdown] internal: proper return value from recursive visitor

alexjobs/deck.js-1,twitwi/deck.js,ProgRT/deck.js,alexjobs/deck.js-1,twitwi/deck.js,ProgRT/deck.js,ProgRT/deck.js,twitwi/deck.js,alexjobs/deck.js-1