message: Fix default value for parameter 'prefix' in slim.tfexample_decoder.BoundingBox.__init__
diff: @@ -102,7 +102,7 @@ class BoundingBox(ItemHandler):
  """An ItemHandler that concatenates a set of parsed Tensors to Bounding Boxes.
  """
  - def __init__(self, keys=None, prefix=None):
  + def __init__(self, keys=None, prefix=''):
  """Initialize the bounding box handler.
  Args:
  