Improve ESMReader error messages

components/esm/esmreader.cpp

@@ -134,7 +134,11 @@ void ESMReader::getHExact(void*p, int size)
 {
     getSubHeader();
     if (size != static_cast<int> (mCtx.leftSub))
-        fail("getHExact() size mismatch");
+    {
+        std::stringstream error;
+        error << "getHExact(): size mismatch (requested " << size << ", got " << mCtx.leftSub << ")";
+        fail(error.str());
+    }
     getExact(p, size);
 }
 

components/esm/esmreader.hpp

@@ -137,7 +137,11 @@ public:
   {
       getSubHeader();
       if (mCtx.leftSub != sizeof(X))
-          fail("getHT(): subrecord size mismatch");
+      {
+          std::stringstream error;
+          error << "getHT(): subrecord size mismatch (requested " << sizeof(X) << ", got " << mCtx.leftSub << ")";
+          fail(error.str());
+      }
       getT(x);
   }