FAIL: bob.io.image.test.test_netpbm

======================================================================
FAIL: bob.io.image.test.test_netpbm
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/opt/conda/envs/_test/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/opt/conda/envs/_test/lib/python2.7/site-packages/bob/io/image/test.py", line 99, in test_netpbm
    transcode(test_utils.datafile('test.pbm', __name__))  # indexed, works fine
  File "/opt/conda/envs/_test/lib/python2.7/site-packages/bob/io/image/test.py", line 88, in transcode
    assert numpy.array_equal(subsample, image3)
AssertionError

https://github.com/conda-forge/bob.io.image-feedstock/pull/18

ping @bob