VLC GUI gone troppo on 4K monitor, in latest stretch/stable update

[Zenaan Harkness <zenaan@freedbms.net>]

Latest stable update causes VLC icons to go huge, on 3.84K * 2.16k
monitor.

Dodgy update bro, dodgy update!

A quick googoyle brings up this:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=884956

which leads to this:

QT_AUTO_SCREEN_SCALE_FACTOR=0 vlc

as the interim solution...

Good luck,