remote_daemon_dispatch: Don't open code xdr_free()
remote_daemon_dispatch: Don't open code xdr_free()

At two places we are open coding xdr_free():
remoteRelayDomainEventTunable() and
remoteRelayDomainEventJobCompleted().
Bot of these functions use make_nonnull_domain() to put domain
IDs tuple into return structure and then continue encoding the
rest of structure. If that fails, they call VIR_FREE() directly.
While this okay, we should use xdr_free() which frees the whole
return structure for us.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>
Reviewed-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

andreabolognani/libvirt,crobinso/libvirt,jardasgit/libvirt,jfehlig/libvirt,zippy2/libvirt,libvirt/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,jardasgit/libvirt,crobinso/libvirt,olafhering/libvirt,libvirt/libvirt,nertpinx/libvirt,olafhering/libvirt,jardasgit/libvirt,jfehlig/libvirt,crobinso/libvirt,andreabolognani/libvirt,olafhering/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,zippy2/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,zippy2/libvirt,jardasgit/libvirt,jfehlig/libvirt,olafhering/libvirt,libvirt/libvirt,libvirt/libvirt,jardasgit/libvirt,zippy2/libvirt,andreabolognani/libvirt,nertpinx/libvirt,crobinso/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,fabianfreyer/libvirt