Add LinkDamage class definition

include/Player/LinkStateHandler.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "global.h"
+#include "types.h"
+
+#include "System/SysNew.hpp"
+#include "Player/PlayerLink.hpp"
+
+class LinkStateHandler : public SysObject {
+    /* 0 (vtable) */
+    /* 4 */ unk32 mSubState;
+    /* 8 */ PlayerLink *mLink;
+    /* c */
+};