ZoneLoading: Simulate the vanilla edge case that the chunk size is in the end of the loadbuffer and cannot quite fit into it so the space is padded and the chunk size is loaded from the beginning of the buffer

src/ZoneLoading/Loading/LoadingFileStream.cpp

@@ -8,4 +8,9 @@ LoadingFileStream::LoadingFileStream(FileAPI::File* file)
 size_t LoadingFileStream::Load(void* buffer, const size_t length)
 {
     return m_file->Read(buffer, 1, length);
+}
+
+int64_t LoadingFileStream::Pos()
+{
+    return m_file->Pos();
 }