Fix slide 17
Fix slide 17

mabrasil/slides-cocoaheads-2015,AbraaoAlves/slides-cocoaheads-2015,AbraaoAlves/slides-cocoaheads-2015,mabrasil/slides-setic-2015,mabrasil/slides-cocoaheads-2015,mabrasil/slides-unidev-2015,mabrasil/slides-setic-2015,mabrasil/slides-unidev-2015