Merge pull request #1967 from lipoolock/patch-1

Need to enforce images list validation

Author: akiran

src/inner-slider.js

@@ -304,7 +304,7 @@ export class InnerSlider extends React.Component {
   };
   checkImagesLoad = () => {
     let images =
-      (this.list.querySelectorAll &&
+      (this.list && this.list.querySelectorAll &&
         this.list.querySelectorAll(".slick-slide img")) ||
       [];
     let imagesCount = images.length,