Update error handling for os2 on windows

core/os/os2/pipe_windows.odin

@@ -6,7 +6,7 @@ import win32 "core:sys/windows"
 _pipe :: proc() -> (r, w: ^File, err: Error) {
 	p: [2]win32.HANDLE
 	if !win32.CreatePipe(&p[0], &p[1], nil, 0) {
-		return nil, nil, Platform_Error{i32(win32.GetLastError())}
+		return nil, nil, _get_platform_error()
 	}
 	return new_file(uintptr(p[0]), ""), new_file(uintptr(p[1]), ""), nil
 }