Do not use architecture dependent type size_t in esm format (Fixes #3633)

components/esm/animationstate.cpp

@@ -21,7 +21,18 @@ namespace ESM
             anim.mGroup = esm.getHString();
             esm.getHNOT(anim.mTime, "TIME");
             esm.getHNOT(anim.mAbsolute, "ABST");
-            esm.getHNT(anim.mLoopCount, "COUN");
+
+            esm.getSubNameIs("COUN");
+            // workaround bug in earlier version where size_t was used
+            esm.getSubHeader();
+            if (esm.getSubSize() == 8)
+                esm.getT(anim.mLoopCount);
+            else
+            {
+                uint32_t loopcount;
+                esm.getT(loopcount);
+                anim.mLoopCount = (uint64_t) loopcount;
+            }
 
             mScriptedAnims.push_back(anim);
         }

components/esm/animationstate.hpp

@@ -3,6 +3,7 @@
 
 #include <string>
 #include <vector>
+#include <stdint.h>
 
 namespace ESM
 {
@@ -20,7 +21,7 @@ namespace ESM
             std::string mGroup;
             float mTime;
             bool mAbsolute;
-            size_t mLoopCount;
+            uint64_t mLoopCount;
         };
 
         typedef std::vector<ScriptedAnimation> ScriptedAnimations;