Meteofrance backend is failing sincec a few days with the following exception:

weboob.core.bcall.CallErrors: Errors during backend calls:
Module(<Backend u'meteofrance'>): ValueError('month must be in 1..12',)
'Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/weboob-1.5-py2.7.egg/weboob/core/bcall.py", line 106, in backend_process
    for subresult in result:
  File "/usr/local/lib/python2.7/dist-packages/weboob-1.5-py2.7.egg/weboob/browser/elements.py", line 203, in __iter__
    for obj in item:
  File "/usr/local/lib/python2.7/dist-packages/weboob-1.5-py2.7.egg/weboob/browser/elements.py", line 346, in __iter__
    self.handle_attr(attr, getattr(self, \'obj_%s\' % attr))
  File "/usr/local/lib/python2.7/dist-packages/weboob-1.5-py2.7.egg/weboob/browser/elements.py", line 363, in handle_attr
    value = self.use_selector(func, key=key)
  File "/usr/local/lib/python2.7/dist-packages/weboob-1.5-py2.7.egg/weboob/browser/elements.py", line 129, in use_selector
    value = func()
  File "/home/meteofrance/.local/share/weboob/modules/1.5/meteofrance/pages.py", line 68, in obj_date
    (base_date.month + 1) % 12
ValueError: month must be in 1..12
'

Module had been updated with weboob-config update