Python 3.4 python extraction is totally broken.

[ztane]

python extractor is completely broken with Python 3.4, lingua 4.3.1; throws on any file with more than 0 bytes.

% ls
total 0
% pot-create .
No files scanned, aborting
% echo > foo.py 
% pot-create . 
Traceback (most recent call last):
  File ".../venv/bin/pot-create", line 11, in <module>
    sys.exit(main())
  File ".../venv/lib/python3.4/site-packages/lingua/extract.py", line 280, in main
    for message in extractor(real_filename, options):
  File ".../venv/lib/python3.4/site-packages/lingua/extractors/python.py", line 349, in __call__
    return parser(token_stream, options, filename, lineno)
  File ".../venv/lib/python3.4/site-packages/lingua/extractors/python.py", line 164, in __call__
    for (token_type, token, location, _) in token_stream:
  File ".../venv/lib/python3.4/site-packages/lingua/extractors/python.py", line 138, in next
    token = self._transform(next(self.queue))
  File ".../venv/lib/python3.4/tokenize.py", line 554, in _tokenize
    if line[pos] in '#\r\n':           # skip comments or blank lines
TypeError: 'in <string>' requires string as left operand, not int