Dxvk: DXVK 1.1 breaks gamma

[grigi]

Gamma adjustment is broken again with DXVK 1.1
Works in 1.0.1 and 1.0.2 (and 0.96 and older)

Issue is the same as https://github.com/doitsujin/dxvk/issues/937#issuecomment-471330437

Software information

Witcher 3 — Proton 4.2 — DXVK 1.1

System information

• GPU: Intel UHD620
• Driver: AMV from mesa git
• Wine version: Wine 4.2 bundles with Proton 4.2-2
• DXVK version: DXVK 1.1
• OS: Gentoo Linux, 5.0.5, KDE5 desktop with compositing disabled.

[doitsujin]

You're right, and I did test this a million times and it was working just fine...