[reddit] gallery error, KeyError: 's'

[slowthgt]

https://www.reddit.com/r/cosplay/comments/jvwaqr/self_zero_two_first_shoot_in_the_plugsuit/
The post itself looks weird as its not a gallery nor a crosspost. Might want to look into handling it.

PoC Log:

>gallery-dl --verbose https://www.reddit.com/r/cosplay/comments/jvwaqr/self_zero_two_first_shoot_in_the_plugsuit/
[gallery-dl][debug] Version 1.15.3
[gallery-dl][debug] Python 3.7.9 - Windows-10-10.0.18362
[gallery-dl][debug] requests 2.24.0 - urllib3 1.25.11
[gallery-dl][debug] Starting DownloadJob for 'https://www.reddit.com/r/cosplay/comments/jvwaqr/self_zero_two_first_shoot_in_the_plugsuit/'
[reddit][debug] Using RedditSubmissionExtractor for 'https://www.reddit.com/r/cosplay/comments/jvwaqr/self_zero_two_first_shoot_in_the_plugsuit/'
[urllib3.connectionpool][debug] Starting new HTTPS connection (1): oauth.reddit.com:443
[urllib3.connectionpool][debug] https://oauth.reddit.com:443 "GET /comments/jvwaqr/.json?limit=0&raw_json=1 HTTP/1.1" 200 1712
# .\gallery-dl\reddit\cosplay\jvwaqr 01 [self] zero two. First shoot in the plugsuit.jpg
[reddit][error] An unexpected error occurred: KeyError - 's'. Please run gallery-dl again with the --verbose flag, copy its output and report this issue on https://github.com/mikf/gallery-dl/issues .
[reddit][debug]
Traceback (most recent call last):
  File "gallery_dl\job.py", line 67, in run
  File "gallery_dl\extractor\reddit.py", line 63, in items
  File "gallery_dl\extractor\reddit.py", line 126, in _extract_gallery
KeyError: 's'