Liblouis hyphenate crash test
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Originally reported at: http://www.freelists.org/post/liblouis-liblouisxml/Another-crash-in-Python-hyphenation

    >>> import louis
    >>> tables = ["cs-g1.ctb", "hyph_cs_CZ.dic"]
    >>> louis.hyphenate(tables, "xxxxxxxxxxxxxxx")
    u'000000000000000'
