Update vbe-decoder.py to fix a utf-8 decoding exception if resulting VB script contains non-ascii chars

[sfunkernw]

Pullrequest on behalf of by colleague to fix an exception with UTF8 chars in the decoded file:

user@laptop:/$ python3 vbe-decoder.py /vb-file-with-non-ascii-content.vbe
Traceback (most recent call last):
  File "vbe-decoder.py", line 103, in decode_file
    contents :str = handle.read()
  File "/usr/lib/python3.8/codecs.py", line 322, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xdc in position 127: invalid continuation byte

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "vbe-decoder.py", line 141, in <module>
    main()
  File "vbe-decoder.py", line 125, in main
    output :list = decode_files(args.files)
  File "vbe-decoder.py", line 95, in decode_files
    output.append(decode_file(file))
  File "vbe-decoder.py", line 105, in decode_file
    fatal_error(f'{e.message}')
AttributeError: 'UnicodeDecodeError' object has no attribute 'message'

Unfortunately can't provide the original vbe for confidentiality reasons.

[vytenisjakubauskas]

Same error:

❯ python3 vbe-decoder.py LOI-929901888222-pdf.vbe
Traceback (most recent call last):
File "/Users/vytenis/tmp/vbe-decoder/vbe-decoder.py", line 103, in decode_file
contents :str = handle.read()
^^^^^^^^^^^^^
File "", line 322, in decode
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/Users/vytenis/tmp/vbe-decoder/vbe-decoder.py", line 141, in
main()
File "/Users/vytenis/tmp/vbe-decoder/vbe-decoder.py", line 125, in main
output :list = decode_files(args.files)
^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/vytenis/tmp/vbe-decoder/vbe-decoder.py", line 95, in decode_files
output.append(decode_file(file))
^^^^^^^^^^^^^^^^^
File "/Users/vytenis/tmp/vbe-decoder/vbe-decoder.py", line 105, in decode_file
fatal_error(f'{e.message}')
^^^^^^^^^
AttributeError: 'UnicodeDecodeError' object has no attribute 'message'