SublimeTODO Error and fix

Fix-SublimeTODO

except IOError:
  ## Probably a broken symlink
  f = None # Instead of pass
finally:
  self.file_counter.increment()
  if f is not None: 
    f.close()

Traceback-SublimeTODO

Traceback (most recent call last):
  File ".\threading.py", line 532, in __bootstrap_inner
  File "./todo.py", line 293, in run
    rendered = list(self.renderer.format(todos))
  File "./todo.py", line 230, in format
    messages = sorted(messages, key=key_func)
  File "./todo.py", line 188, in extract
    f.close()
UnboundLocalError: local variable 'f' referenced before assignment