Re: Refactor query normalization into core query jumbling

Hi,

Though this may be tangential to the current topic, I have long been wanting to revise the two instances of `Assert(len_to_wrt >= 0);`
in the code to the implementation below. Would you kindly advise if this modification is worthwhile?

```
	if (len_to_wrt > 0)
	{
		memcpy(norm_query + n_quer_loc, query + quer_loc, len_to_wrt);
		n_quer_loc += len_to_wrt;
	}
```

--
Regards,
Man Zeng
www.openhalo.org