Fixed issue #1789: error when calling swiper.appendSlide(), prependSlide() or removeSlide() with empty array.
Fixed issue #1789: error when calling swiper.appendSlide(), prependSlide() or removeSlide() with empty array.

iamxiaoma/Framework7,nolimits4web/Framework7,dingxin/Framework7,dingxin/Framework7,mgesmundo/Framework7,iamxiaoma/Framework7,iamxiaoma/Framework7,framework7io/Framework7,framework7io/Framework7,mgesmundo/Framework7,iamxiaoma/Framework7,nolimits4web/Framework7,AdrianV/Framework7,AdrianV/Framework7,AdrianV/Framework7,nolimits4web/Framework7,mgesmundo/Framework7