[PATCH] Fix nisplus-alias compile with gcc7

[Joseph Myers]

On Wed, 21 Dec 2016, Richard Henderson wrote:

> I think the patch is fairly obvious: return error if there is no
> name as opposed to if there isn't.

I've taken this statement of obviousness as consensus to commit my 
(identical) patch 
<https://sourceware.org/ml/libc-alpha/2016-12/msg00771.html>.  Bug 20987 
remains open for the various apparently unbounded stack allocations for 
NIS+.

-- 
Joseph S. Myers
joseph@codesourcery.com