title: Error using images2gif.py when resize animated GIF
body: <p>I'm doing a project in which I have to resize animated GIF . I use Python and images2gif.py (<a href="http://code.google.com/p/visvis/source/browse/vvmovie/images2gif.py" rel="nofollow">here</a>) . It works well with many images Gif but when I test with this image <a href="http://i.stack.imgur.com/8bKmT.gif" rel="nofollow"> here</a>
  an error occurs: </p>
  
  <pre><code>ValueError: operands could not be broadcast together with shapes (96,100,4) (96,100,3)
  </code></pre>
  
  <p>My code here:</p>
  
  <pre><code>import Image
  import images2gif
  
  frames = images2gif.readGif("Images/image2.gif", False)
  
  for frame in frames:
    frame.thumbnail((100,100), Image.ANTIALIAS)
  
  images2gif.writeGif('Images/image2out.gif', frames)
  </code></pre>