Fix dumping co_varnames

[c10udlnk]

When dumping Code2 object, it will dump members of co_varnames as unicode. But they also should be string entries like co_names.

If they're unicode, uncompyle6 will treat them as bytes, and the decompilation output will be inappropriate like (the code object corresponding to the binary in the above figure):

# python2.7 code
    def __init__(b'O_O', b'o_O', b'OwOO_O', b'O_OO_O', b'o_OO_O'):
        O_O.o_O = o_O
        O_O.OwOO_O = OwOO_O
        O_O.O_OO_O = O_OO_O
        O_O.o_OO_O = o_OO_O

It must be:

    def __init__(O_O, o_O, OwOO_O, O_OO_O, o_OO_O):
        O_O.o_O = o_O
        O_O.OwOO_O = OwOO_O
        O_O.O_OO_O = O_OO_O
        O_O.o_OO_O = o_OO_O

In my opinion, the modification should be done on the xdis side, because co_varnames and co_names are both variable names.
Thank you for such an awesome and useful tool!

[rocky]

Thanks for the kind words and thanks for the fix!

Just today realized how to make xdis awesomer and more useful. So stay tuned!