vasyabigi/angular-slick — pull request #42 by donatasdwix (2014-12-05 10:39:30+00:00)
Title: fix "undefined" text in slick dots (bullets)

When user does not define customPaging fn, slick returns "undefined" text instead of default value - element (see https://github.com/kenwheeler/slick/blob/master/slick/slick.js#L57 for reference).
Directive should not pass "null" if customPaging wasn't defined by the user.