pylint #5634 pylint crashes if a wrong filename is given on the command line [resolved]

reported by V. Chukharev:

$ pylint name_of_a_nonexisting_file
No config file found, using default configuration
Traceback (most recent call last):
  File "/usr/local/bin/pylint", line 4, in <module>
    lint.Run(sys.argv[1:])
  File "/usr/local/lib/python2.5/site-packages/pylint/lint.py", line 901, in __init__
    linter.check(args)
  File "/usr/local/lib/python2.5/site-packages/pylint/lint.py", line 457, in check
    filemods = self.expand_files(files_or_modules)
  File "/usr/local/lib/python2.5/site-packages/pylint/lint.py", line 527, in expand_files
    self.set_current_module(modname)
  File "/usr/local/lib/python2.5/site-packages/pylint/lint.py", line 552, in set_current_module
    self.stats['by_module'][modname] = {}
TypeError: 'NoneType' object is unsubscriptable