error "year out of range" in song year

[cbrianso]

Hi

The reading of the tags of the song files, generate error when the year is inferior to 1900

Exception in thread Thread-14:
Traceback (most recent call last):
  File "/usr/lib/python2.4/threading.py", line 442, in __bootstrap
    self.run()
  File "/usr/lib/python2.4/threading.py", line 422, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/home/carles/projectes-interessants/listen/trunk-0.6/src/widget/jobs_manager.py", line 215, in __run
    for text, percent, pulse in self.job():
  File "/home/carles/projectes-interessants/listen/trunk-0.6/src//source/local.py", line 200, in job
    ListenDB.get_or_create_song(tags,"local",read_from_file=True)
  File "/home/carles/projectes-interessants/listen/trunk-0.6/src/library.py", line 374, in get_or_create_song
    self.add([s])
  File "/home/carles/projectes-interessants/listen/trunk-0.6/src/library.py", line 276, in add
    if sanitarize: song.sanitarize()
  File "/home/carles/projectes-interessants/listen/trunk-0.6/src/song.py", line 393, in sanitarize
    self["#date"] = utils.strdate_to_time(date)
  File "/home/carles/projectes-interessants/listen/trunk-0.6/src/utils.py", line 457, in strdate_to_time
    return mktime(new_date)
ValueError: year out of range

The patch prevent the error, not solve it