The #endif preprocesseur instruction should be placed a the end of you header file.
But anyway you should put the struct in HellriftAffixes.h like I show you in first place and add an:
#include "HellriftAffixes.h"
In The main project header file.
A tips, don’t use :
#ifndef HELLRIFT_H
#define HELLRIFT_H
#endif // HELLRIFT_H
its an old way.
Use just:
#pragma once
It works under linux too