Fix an issue with slickGoTo

Author: akiran

examples/SlickGoTo.js

@@ -17,6 +17,7 @@ export default class SlickGoTo extends Component {
       speed: 500,
       slidesToShow: 1,
       slidesToScroll: 1,
+      ...this.props
     };
     return (
       <div>
@@ -31,4 +32,4 @@ export default class SlickGoTo extends Component {
       </div>
     );
   }
-}
+}

examples/__tests__/SlickGoTo.test.js

@@ -18,4 +18,10 @@ describe('SlickGoTo', () => {
     wrapper.find('input').simulate('change', { target: { value: 0 } })
     expect(wrapper.find('.slick-slide.slick-active img').props().src).toEqual("/img/react-slick/abstract01.jpg");
   });
-});
+  it('should go to 1st slide from another 3rd slide', () => {
+    const wrapper = mount(<SlickGoTo waitForAnimate={false} />)
+    wrapper.find('input').simulate('change', { target: { value: 3 } })
+    wrapper.find('input').simulate('change', { target: { value: 0 } })
+    expect(wrapper.find('.slick-slide.slick-active img').props().src).toEqual("/img/react-slick/abstract01.jpg");
+  });
+});

src/inner-slider.js

@@ -120,7 +120,7 @@ export var InnerSlider = createReactClass({
   },
   slickGoTo: function (slide) {
     slide = Number(slide)
-    slide && this.changeSlide({
+    !isNaN(slide) && this.changeSlide({
       message: 'index',
       index: slide,
       currentSlide: this.state.currentSlide