fix asset upgrade for arrays

src/dependency/minidef/src/CppGen.cpp

@@ -198,7 +198,10 @@ namespace Gen
     constexpr char LoadFuncBodyTypeUpgradeMember3[] = R"END(                if (bx::strCmp(memberName, "%s") == 0)
                 {
                     auto* fieldPtr = reinterpret_cast<%s*>(objBasePtr + WriteDestinations[j]);
-                    isOk = Load(fieldPtr, %u, serializer) && isOk;
+                    uint16_t wantedCount = %u;
+                    uint16_t existingCount = matchedDef.ChildArraySizes[j];
+                    isOk = Load(fieldPtr, bx::min(wantedCount, existingCount), serializer) && isOk;
+                    if (existingCount > wantedCount) serializer.Skip((existingCount - wantedCount) * childDef.Size);
                     continue;
                 }
 )END";