Conversion warnings when compiling (int --> flzuint8, flzuint32 --> flzuint8)

```
What steps will reproduce the problem?
1. Compile the code with high warning level.

Those warnings could be avoided by using the proper casts 

   *op = static_cast<flzuint8>(..)

Thank you.
```

Original issue reported on code.google.com by `fmue...@gmail.com` on 13 Jul 2011 at 1:42
