k_stdlib/nw4r.h fails compilation

[Meatball132]

nw4r.h from k_stdlib is mostly copypasted from NewerSMBW, but it's missing some definitions and typedefs that weren't copied over which are still needed to compile (e.g. nw4r::ut::Rect, ulong and uchar, and several others).

As of right now, including it in a project causes compilation errors, so it is not usable.