fix  error 

Traceback (most recent call last):
  File "d:\tmp\github\uncompyle2\uncompyle2\__init__.py", line 205, in main
    uncompyle_file(infile, outstream, showasm, showast)
  File "d:\tmp\github\uncompyle2\uncompyle2\__init__.py", line 142, in uncompyle_file
    uncompyle(version, co, outstream, showasm, showast)
  File "d:\tmp\github\uncompyle2\uncompyle2\__init__.py", line 88, in uncompyle
    assert type(co) == types.CodeType
AssertionError