Bug: Issue when perPage not defined, but breakpointSlidesPerPage is

Hey there,

I encountered a bug and was only able to create a workaround as I am too inexperienced to fix it. It's about the following code in Carousel.vue: breakpointSlidesPerPage() { if (!this.perPageCustom) { return this.perPage } const breakpointArray = this.perPageCustom const width = this.browserWidth const breakpoints = breakpointArray.sort((a, b) => ((a[0] > b[0]) ? -1 : 1)) // Reduce the breakpoints to entries where the width is in range // The breakpoint arrays are formatted as [widthToMatch, numberOfSlides] const matches = breakpoints.filter(breakpoint => width >= breakpoint[0]) // If there is a match, the result should return only // the slide count from the first matching breakpoint const match = matches[0] && matches[0][1] return match || this.perPage },

What's wrong is, that, if I define a carousel like such: <carousel class="ProjectSlider" :perPageCustom="[[480, 1],[768, 2]]" :navigationEnabled="true">

For devices with width > 480, 1 slide will be shown, for width > 768, 2 slides will be shown and for < 480, match will be undefined (I debugged that) and if perPage is not defined, the view will be buggy. I just set perPage to 1 to circumvent that bug, but this behaviour is not the behaviour described in the documentation.