[vivo] Still not working, Fix available

[dhoepfl]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.05.20
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

Verbose log

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v', u'https://vivo.sx/5ec5b4cd00']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.05.20
[debug] Python version 2.7.13 (CPython) - Linux-4.9.0-8-amd64-x86_64-with-debian-9.9
[debug] exe versions: ffmpeg 4.1, ffprobe 4.1, rtmpdump 2.4
[debug] Proxy map: {}
[Vivo] 5ec5b4cd00: Downloading webpage
WARNING: unable to extract title; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/opt/youtube-dl/bin/youtube-dl/__main__.py", line 19, in <module>
  File "/opt/youtube-dl/bin/youtube-dl/youtube_dl/__init__.py", line 474, in main
  File "/opt/youtube-dl/bin/youtube-dl/youtube_dl/__init__.py", line 464, in _real_main
  File "/opt/youtube-dl/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 2008, in download
  File "/opt/youtube-dl/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 796, in extract_info
  File "/opt/youtube-dl/bin/youtube-dl/youtube_dl/extractor/common.py", line 529, in extract
  File "/opt/youtube-dl/bin/youtube-dl/youtube_dl/extractor/shared.py", line 26, in _real_extract
  File "/opt/youtube-dl/bin/youtube-dl/youtube_dl/compat.py", line 2947, in compat_b64decode
  File "/usr/lib/python2.7/base64.py", line 75, in b64decode
    return binascii.a2b_base64(s)
TypeError: a2b_base64() argument 1 must be string or buffer, not None

Description

This is a duplicate of #18906. The original issue is locked so I cannot comment there. There is a fix for it that I sent as pull request (#19217). I tried hard to match your code guidelines/styles but the fix never got merged.

Maybe someone could have a look at the pull request, fix what is wrong with my code and get it merged?