title: ratingbar not working (not clickable) when using ratingBarStyleSmall style
body: <p>ratingbar didn't change when the user click on it ?</p>
  
  <p>her is my xml code </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context="com.example.soulhis.testmaterialdesign.Test"&gt;
  &lt;RatingBar
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:id="@+id/ratingBar4"
      android:layout_centerVertical="true"
      style="?android:attr/ratingBarStyleSmall"
       android:layout_centerHorizontal="true" /&gt;
   &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>the problem occur just when using ratingBarStyleSmall 
  tested on android jellybean api level 17 </p>