title: Blank screen on SlidingMenu when using with Fragment (GMap)
body: <p>So i use SlidingMenu library with a FragmentActivity in my app.</p>
  
  <p>There is a GoogleMap in the layout and a menu on the left side with some content.
  When i pull the menu to see it, there is a big black rectangle there, covering my sliding menu content. After i click it once, it is disapearing.</p>
  
  <p>Can anybody has something to say about this?
  <img src="https://i.stack.imgur.com/Pv43u.png" alt="A simple map.">
  <img src="https://i.stack.imgur.com/0hjUC.png" alt="enter image description here"></p>