Re: Fix recent 'unpack_trees()'-related changes breaking 'git stash'

> So it might be better to make that thing be just
> 
> >  	memset(&o->result, 0, sizeof(o->result));
> > +	if (o->src_index)
> > +		o->result.timestamp = o->src_index->timestamp;
> >  	o->merge_size = len;
> 
> instead of checking both src_index *and* dst_index. The source index is 
> all that matters anyway. Even if 'o->result' isn't used in the end, who 
> cares? We can still give it the right timestamp.
> 
> And no, this really isn't likely to matter, but let's pick the simpler 
> version if it doesn't matter.