badmatch on create_window_surface

[uglyoldbob]

I am getting a badmatch error in my egui-multiwin library (https://github.com/uglyoldbob/egui-multiwin).
The egui-multiwin demo binary crashes when creating a transparent window on ubuntu linux.
Crash occurs at glutin::display::Display::create_window_surface.
cargo run --bin multiwin-demo

[kchibisov]

you're not using glutin's visual from the config to build a winit window, thus the window you can't create a window surface because your window and config has different visual leading to BadMatch.