Crash in pdf2txt.py, due to recently added code

[hughsw]

Running pdf2txt.py on the attached PDF crashes with an attribute error in recently added code, commit 82af7f0 (see #56).

175.pdf

bash-3.2$ python3 /usr/local/bin/pdf2txt.py 175.pdf
INFO:pdfminer.pdfdocument:xref found: pos=b'774066'
INFO:pdfminer.pdfdocument:read_xref_from: start=774066, token=/b'xref'
INFO:pdfminer.pdfdocument:xref objects: {2: (None, 9, 0), 3: (None, 400798, 0), 4: (None, 400895, 0), 5: (None, 773855, 0), 6: (None, 401082, 0), 7: (None, 773571, 0), 8: (None, 773668, 0), 9: (None, 773919, 0), 10: (None, 773970, 0)}
INFO:pdfminer.pdfdocument:trailer: {'Size': 10, 'Root': <PDFObjRef:8>, 'Info': <PDFObjRef:9>}
INFO:pdfminer.pdfdocument:trailer: {'Size': 10, 'Root': <PDFObjRef:8>, 'Info': <PDFObjRef:9>}
Traceback (most recent call last):
  File "/usr/local/bin/pdf2txt.py", line 129, in <module>
    if __name__ == '__main__': sys.exit(main())
  File "/usr/local/bin/pdf2txt.py", line 124, in main
    outfp = extract_text(**vars(A))
  File "/usr/local/bin/pdf2txt.py", line 64, in extract_text
    pdfminer.high_level.extract_text_to_fp(fp, **locals())
  File "/usr/local/lib/python3.6/site-packages/pdfminer/high_level.py", line 81, in extract_text_to_fp
    check_extractable=True):
  File "/usr/local/lib/python3.6/site-packages/pdfminer/pdfpage.py", line 121, in get_pages
    doc = PDFDocument(parser, password=password, caching=caching)
  File "/usr/local/lib/python3.6/site-packages/pdfminer/pdfdocument.py", line 579, in __init__
    self.info.append(dict_value(trailer['Info']))
  File "/usr/local/lib/python3.6/site-packages/pdfminer/pdftypes.py", line 164, in dict_value
    x = resolve1(x)
  File "/usr/local/lib/python3.6/site-packages/pdfminer/pdftypes.py", line 84, in resolve1
    x = x.resolve(default=default)
  File "/usr/local/lib/python3.6/site-packages/pdfminer/pdftypes.py", line 71, in resolve
    return self.doc.getobj(self.objid)
  File "/usr/local/lib/python3.6/site-packages/pdfminer/pdfdocument.py", line 689, in getobj
    obj = self._getobj_parse(index, objid)
  File "/usr/local/lib/python3.6/site-packages/pdfminer/pdfdocument.py", line 655, in _getobj_parse
    while kwd is not self.KEYWORD_OBJ:
AttributeError: 'PDFDocument' object has no attribute 'KEYWORD_OBJ'

[goulu]

Solved in b010db6
(sorry, it was a stupid mistake, thanks for reporting it)