Wrong instance variables size for C++ and C#
For example:
1. Open [vlq_base128_le](http://formats.kaitai.io/vlq_base128_le/)
2. Read this 

> This particular implementation supports serialized values to up 8 bytes long.

3. Compile this template for C++ or C#
4. And now we see that compiler uses only 32-bit integer for instance variables