fix: without libwayland-egl, Wayland windows draw without OpenGL instead of crashing

wgpu-hal expects libwayland-egl as soon as its OpenGL backend configures a
Wayland surface. Where the library is missing, Snowbound leaves OpenGL out of
the instance, so Vulkan draws or the adapter request fails with an error.

Assisted-by: claude-opus-5.5
0108e94dffclover caruso committed on 10/1/2026, 11:23:40 PMparent418e0a5
1 file changedLine totals unavailable