title: Qt design issue with QTableWidget
body: <p>At the moment, I am programming a little map editor for my 2D-RPG game.
  All functions are successfully implemented, but my problem is, that the textures for each cell in my <code>QTableWidget</code> aren't stretched to the full size of 32x32. I have already changed the <code>sizeHint</code> settings, but it doesn't work.
  Here a little <a href="http://s14.directupload.net/images/131231/acqnwyss.png" rel="nofollow">picture</a> about my problem.</p>
  
  <p>As you can see, in each cell are a white background and the textures aren't fully stretched. Actually I load the textures over the <code>setIcon</code> function, maybe an other way exists to load images in a cell? How can I fix it, for stretching to the full size of 32x32?</p>