title: adaptive height is not working on vertical and fade mode in bxslider plugin
body: <p>I am working on bx Slider JQuery plugin. I configure <code>adaptiveHeight: false</code>. This configuration is working fine on mode as horizontal. But, not working mode as vertical and fade. that slider height is increasing and decreasing based on the slider images, But i want a fixed height.How to fix this issue.</p>
  
  <p><a href="http://jsfiddle.net/w16z3gt0/1/" rel="nofollow"><strong>Fiddle</strong></a></p>
  
  <p><strong>my configuration is:</strong></p>
  
  <pre><code>$('.slider').bxSlider({
     adaptiveHeight: false,
     auto: false,
     autoControls: false,
     autoDirection: "",
     autoHover: false,
     autoStart: false,
     captions: false,
     easing: "linear",
     hideControlOnEnd: false,
     infiniteLoop: false,
     maxSlides: 1,
     minSlides: 1,
     mode: "vertical",
     nextSelector: "#slider-next",
     nextText: "&lt;img src= style="width:35px;height:35px;"/&gt;",
     pager: false,
     pause: false,
     prevSelector: "#slider-prev",
     prevText: "&lt;img src= style="width:35pxpx;height:35px;"/&gt;",
     randomStart: false,
     slideMargin: 10,
     slideWidth: 150,
     speed: 1000,
     startSlide: 0
  });
  </code></pre>