[PATCH 0/4] MR6658: ddraw: Some fixes for SwapTextureHandles().

[Paul Gofman (＠gofman)]

First of all it fixes a regression introduced by 5a7ff3b45c78784dca0a465d9e21483f72bce6e5 when surface handles were moved to global table but SwapTextureHandles was left behind (https://bugs.winehq.org/show_bug.cgi?id=57300).

Then, I am fixing a couple of more issues with this function spotted on the way.

I did some initial testing of SwapTextures across devices and that looks messy, device on which the swap is performed influences the outcome in some not immediately obvious way. I omitted the investigation of that because multiple 3d devices in ddraw is already a very exotic use case and I think we are unlikely to meet the usage of SwapTextures across multiple devices.