[libvirt] [PATCH 3/4] virCommand: Make virCommandPassFDGetFDIndex fail if passed command is in error state

[Erik Skultety]

On Tue, May 14, 2019 at 11:24:11AM +0200, Michal Privoznik wrote:
> The idea of virCommand* APIs is that a possible error that
> occurred while constructing cmd line is kept in virCommand
> struct. If that's the case all subsequent calls to virCommand*()
> are NO-OPs or they return an error. Well,
> virCommandPassFDGetFDIndex() is not honoring that.
>
> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> ---
Reviewed-by: Erik Skultety <eskultet at redhat.com>