Disable handling alpha channels in 32bpp bitmaps.
As far as I know, .bmp files do not have an alpha channel. What's more, this code prevented truncated 32-bpp bitmaps from being rendered in the same way that truncated 24bpp bitmaps are rendered.
Authored by: david_costanzo 2021-11-29
Parent: [r5830]
Child: [r5832]