title: Setting height and width of an Anko view to match_parent
body: <p>I would like to set the height and width of an video view to <code>match_parent</code>. My code looks something like the following. It works without the <code>height</code> and <code>width</code> attributes, but doing it as below give me a <code>val cannot be reassigned</code> error.</p>
  
  <pre><code>class VideoActivityUI : AnkoComponent&lt;VideoActivity&gt; {
      companion object {
          val ID_VIDEO = 11
      }
  
      override fun createView(ui: AnkoContext&lt;VideoActivity&gt;) = with(ui) {
          videoView{
              id = ID_VIDEO
              height = matchParent
              width = matchParent
          }
      }
  }
  </code></pre>