The virutil.h header defines a geteuid() macro for Windows platforms.
This fixes a few missed cases from:

  commit b11e8ccc
  Author: Ján Tomko <jtomko@redhat.com>
  Date:   Sun Feb 16 23:09:15 2020 +0100

    Remove virutil.h from all header files
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>