[libvirt] Magic error introduced by commit f09accc

[Jiri Denemark <jdenemar redhat com>]

Hi all,

After commit f09accc (buf: add virBufferVasprintf) libvirt no longer compiles
with -Werror because of the following error:

    CC     libvirt_util_la-macvtap.lo
cc1: warnings being treated as errors
/usr/include/netlink/object.h:58: error: inline function 'nl_object_priv'
declared but never defined

I must admit I don't understand why including stdarg.h (which seems to be the
only change visible in macvtap.c) results in this warning.

Does anyone have an idea?

Jirka