Semi-determinism in Exempi

[Hubert Figuiere]

> For individual cases like that it is a bug. I'll recheck the code and
> make sure it does it properly by resetting the error code. It is already
> supposed to be 0 if there is no error. I'll see if this can be improved.
> 
> Also I have to make it thread safe, it isn't currently, ie if called
> from different thread the error code may be overridden. Having it
> per-thread should help.

This will be in 2.0.1 that I'll release very soon.


Hub