Do not use union to access FIXED_STRING<4> as int

https://en.cppreference.com/w/cpp/language/union:
> It's undefined behavior to read from the member of the union that wasn't most recently written.

components/esm/loadingr.cpp

@@ -18,7 +18,7 @@ namespace ESM
         while (esm.hasMoreSubs())
         {
             esm.getSubName();
-            switch (esm.retSubName().intval)
+            switch (esm.retSubName().toInt())
             {
                 case ESM::SREC_NAME:
                     mId = esm.getHString();