Fixes std.meta.Tuple and std.meta.ArgsTuple for zero-sized types (like void).
Fixes std.meta.Tuple and std.meta.ArgsTuple for zero-sized types (like void).

raulgrell/zig,raulgrell/zig,andrewrk/zig,andrewrk/zig,raulgrell/zig,zig-lang/zig,zig-lang/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig