Previously pointers were removed here to facilitate using anonymous struct
literals. Now that Zig supports &.{, these are no longer required, and they
can be pointers again.
Note that there are still some problems in the Zig stage1 compiler, see
https://github.com/ziglang/zig/issues/7627 for example.
I am porting this example to [mach-glfw](github.com/hexops/mach-glfw), and noticed that no GLFW error handling callback is registered because in my port there are a lot of GLFW errors :)
`glfwSwapBuffers` here is emitting `GLFW_NO_WINDOW_CONTEXT` errors constantly, because calling it without a valid OpenGL context is illegal. It's not needed for Vulkan.
