[includedeck] fix/workaround for head.js not invoking the callback when the last element is a css file
[includedeck] fix/workaround for head.js not invoking the callback when the last element is a css file

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