[vsipl++] PATCH: ghs workaround

[Jules Bergmann]

Stefan,  I'm sorry that I missed this.  Please apply if you haven't done 
so already.  Also, I'll post the extdata.hpp patch in a bit.  -- Jules

Stefan Seefeld wrote:
> It appears ghs didn't like the way I used a template default argument
> to combine a unary functor and a binary functor into one.
> This patch separates both, and makes ghs happy.
> 
> Regards,
>         Stefan
>