Wipe type "crossfade" doesn't work

[Nash]

gzdoom-g2.2pre-1994-g0fdd80e

The crossfade screen wipe is non-functional.

(Melt and burn works properly)

EDIT: I just realized that my NVidia driver wasn't up-to-date yesterday but even with the latest driver, this bug still persists

[dpJudas]

This also happens on my card. Don't think its a driver specific thing. More maybe that way it does the wipe assumes the alpha channel is always 1 or something similar. I glanced at it quickly and nothing obvious is wrong (i.e. the wipe start and end textures do have valid content).

[Graf Zahl]

fixed. This was caused by incorrectly setting up what data to get from the vertex buffer.