std.mem.zeroes: Zero sized structs with uninitialized members (#12246)

`std.mem.zeroes(struct{handle: void})` Failed with the following error before:
```
/nix/store/l6v4359wc9xrxxmvvp3rynsb5s3d78xf-zig-0.9.1/lib/zig/std/mem.zig:270:42: error: missing field: 'handle'
            if (@sizeOf(T) == 0) return T{};
                                         ^
```
18440cb239N00byEdge committed on 8/5/2022, 12:47:52 PM· committed by GitHubparent44c321c
1 file changedLine totals unavailable