old_contents: import logging
  
  
  logger = logging.getLogger(__name__)
  
  def crop_corners(image, box=None, **kwargs):
      """
      Crop corners to the selection defined by image_cropping
      """
  
      if box:
          try:
              values = [int(x) for x in box.split(',')]
              if sum(values) < 0:
                  return image
              width = abs(values[2] - values[0])
              height = abs(values[3] - values[1])
              if width and height and (width != image.size[0] or height != image.size[1]):
                  image = image.crop(values)
          except (ValueError, IndexError):
              # There's garbage in the cropping field, ignore
              logger.warning('Unable to parse "box" parameter value "%s". Ignoring.' % box)
  
      return image
  
  
new_contents: import logging
  
  
  logger = logging.getLogger(__name__)
  
  def crop_corners(image, box=None, **kwargs):
      """
      Crop corners to the selection defined by image_cropping
      """
  
      if box and box[0] != '-':
          try:
              values = [int(x) for x in box.split(',')]
              if sum(values) < 0:
                  return image
              width = abs(values[2] - values[0])
              height = abs(values[3] - values[1])
              if width and height and (width != image.size[0] or height != image.size[1]):
                  image = image.crop(values)
          except (ValueError, IndexError):
              # There's garbage in the cropping field, ignore
              logger.warning('Unable to parse "box" parameter value "%s". Ignoring.' % box)
  
      return image
  
  
subject: Update thumbnail processor