[Bug 56799] MJUCjr VST GUI needs WaitForVBlank() to refresh its window

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=56799

--- Comment #7 from Fabian Maurer  ---
There is a few similar issues:
Bug 46091 (GameMaker game Deltarune plays at too high a framerate, impacting
game speed)
Bug 9154 (Balls of Steel demo v1.3 fails to start a game
(ddraw7_WaitForVerticalBlank stub too fast, needs real implementation))
Bug 55520 (Witch's Heart and its two other games: Runs too quickly in windowed
mode)

In the last I attached a small hack that is probably slightly better than a
simple sleep: https://bugs.winehq.org/attachment.cgi?id=75447
(It's for ddraw, but the concept should be the same)