title: Using putpixel() doesn't write pixel values to image
body: <p>I am using <code>putpixel</code> on an image (<code>srcImage</code>)  which is w = 134 and h = 454.</p>
  
  <p>The code here gets the r,g,b value of a part of the font which is 0,255,0 (which I found through debugging, using print option).</p>
  
  <pre><code>image = letters['H']  
  r,g,b = image.getpixel((1,1)) #Note r g b values are 0, 255,0
  srcImage.putpixel((10,15),(r,g,b))   
  srcImage.save('lolmini2.jpg')
  </code></pre>
  
  <p>This code does not throw any error. However, when I check the saved image I cannot spot the pure green pixel.</p>