[libvirt] review fallout: short memset

[Daniel P. Berrange]

On Tue, Dec 02, 2008 at 03:02:53PM +0100, Jim Meyering wrote:
> While reviewing unrelated changes, I spotted a short memset:
> 
>     char **names;
>     ...
>     memset(names, 0, maxnames);
> 
> That zeros out 1/4 or 1/8 of the memory than it should.
> It should be doing this:
> 
>     memset(names, 0, maxnames * sizeof (*names));
> 
> I checked all memset uses and found a total of 6 uses like that.
> This fixes them:

ACK to this immediate fix. As per my other mail we should consider
adding a VIR_ZERO() macro for this, to avoid such errors recurring

Daniel
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