title: autopy gives a ValueError when taking a screenshot
body: <p>I'm trying to take an image of a small section on my screen using autopy and for some reason I'm getting an error. For reference, I am running on a 1920x1080 display. Here's the code:</p>
  
  <pre><code>box = ((995, 5), (995 + 212, 5 + 72))
  autopy.bitmap.capture_screen(box)
  Traceback (most recent call last):
    File "&lt;input&gt;", line 1, in &lt;module&gt;
  ValueError: The Image's dimensions are either too small or too large
  </code></pre>
  
  <p>Can anyone tell me what I'm doing wrong?</p>