Switch the function to use VIR_AUTOFREE and VIR_AUTOPTR macros
to get rid of the cleanup section.
Requested-by: NJohn Ferlan <jferlan@redhat.com>
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>