OMP and binary_hash fixes for dominosec format

I am not very sure about these fixes. Please review.

Now,

```
$ ../run/john --format=dominosec -t 
Will run 4 OpenMP threads
Benchmarking: dominosec, Lotus Notes/Domino 6 More Secure Internet Password [8/64]... (4xOMP) DONE
Many salts:	167808 c/s real, 43814 c/s virtual
Only one salt:	159104 c/s real, 42769 c/s virtual
```

Before,

```
$ ../run/john --format=dominosec -t 
Benchmarking: dominosec, Lotus Notes/Domino 6 More Secure Internet Password [8/64]... DONE
Many salts:	76766 c/s real, 76766 c/s virtual
Only one salt:	45739 c/s real, 45739 c/s virtual
```