Fix the bug where 'walk' callback was not triggered with 'next' or 'previous' methods.
Fix the bug where 'walk' callback was not triggered with 'next' or 'previous' methods.

saurabh27125/vegas,atilkan/vegas,jefersondeoliveira/vegas,jaysalvat/vegas,emoron/vegas,tagme/vegas,sikofitt/vegas,terryma/vegas