GIF: error in DGifGetImageDesc()

Created by: 183amir

https://travis-ci.org/conda-forge/bob.io.image-feedstock/builds/135645811 I will investigate more and update this issue. This happens on osx only. It happens on osx and Linux.

ERROR: bob.io.image.test.test_cpp_interface

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Traceback (most recent call last):

  File "/Users/travis/miniconda3/envs/_test/lib/python2.7/site-packages/nose/case.py", line 197, in runTest

    self.test(*self.arg)

  File "/Users/travis/miniconda3/envs/_test/lib/python2.7/site-packages/bob/io/image/test.py", line 77, in test_cpp_interface

    _test_io(tmpdir)

RuntimeError: _test_io: C++ exception caught: 'GIF: error in DGifGetImageDesc().'