[video_core] fix TOCTOU in Vulkan instance extension enumeration (#4072)

So CreateInstance was enumerating instance extensions twice, and that could race if the driver returned a different list the second time. On some AMD iGPU drivers, we could enable an extension from the first list, then fail the second check with VK_ERROR_EXTENSION_NOT_PRESENT.

Fix this by enumerating once and passing that same snapshot into RequiredExtensions.

Fixes: https://github.com/eden-emulator/Issue-Reports/issues/414
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4072
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

0 files changed, 0 insertions, 0 deletions