Playlist creation of any kind fails SILENTLY if the playlist directory does not exist

Description

Any attempt to create a playlist in RetroArch, using any front end, will silently fail if the specified playlist destination directory does not currently exist.

Expected behavior

EITHER:

• The specified directory is auto-created and the playlist is added,
• OR RetroArch indicates to the user that playlist creation failed because the directory is not there
• OR, at absolute minimum, RetroArch indicates that playlist creation somehow failed without going into specifics.

Actual behavior

Playlist creation steps are allowed to continue and complete as though there are no problems and no errors are displayed, but no playlists are added.

Steps to reproduce the bug

1. Get a new installation of RetroArch; download the databases, a ROM or two, and an accompanying core.
2. Change the "playlist" directory to a new directory path that does not presently exist.
3. Attempt to add a playlist by scanning the directory with your ROM(s) in it.
4. Be mystified when there is no playlist and yet there was no indication that anything went wrong.

Version/Commit

• RetroArch: 1.9.0; Git Version 6388872a54

Environment information

• OS: Windows 10 20H2

No file, test, or entry point is named in the issue. Reproduce the scan with a playlist directory that does not exist, then trace playlist creation from that action; the work is done when the directory is created or the failure is reported instead of appearing successful.