title: QFileDialog encoding error (Windows 7)
body: <p>When i try to use standart filechooser:</p>
  
  <pre><code>QString fileName = QFileDialog::getOpenFileName(a.allWidgets().first(),
       "Open Image", "C:\\", "Image Files (*.png *.jpg *.bmp)");
  </code></pre>
  
  <p>the error is appear. I see the message, like this (sorry, it's in russian):</p>
  
  <p><img src="https://i.stack.imgur.com/QhakN.jpg" alt=""></p>
  
  <p>the translation of first line is "C:\Users\Василий\Desctop references an inaccessible location". I think, that problem in user-name "Василий" (russian letters), which not clearly written on screenshot. I have tried to find in Google the solving of my problem, but unfortunately, I haven't find. Help please.</p>