Fix MSVC error

Fix MSVC error

Compiling the current master with MSVC gives the following error:

```
search.cpp(956): error C2660: 'operator *': function does not take 1 arguments
types.h(303): note: see declaration of 'operator *'
```

This was introduced in commit:
https://github.com/official-stockfish/Stockfish/commit/88de112b84a5285c2afb3e075a05c2ab8ad3fd33

We use a suggestion by @vondele to fix the error, thanks!

No functional change.