Author: Simo Sorce <simo(a)redhat.com>
Date: 2022-12-08 (Thu, 08 Dec 2022)
Guard against NULL remote credentials
In some rare cases is may happen that we fail to init
cred_handle->remote, in this case we need to guard xdr_free() because
this function does not handle NULL pointers gracefully like free() does.
Signed-off-by: Simo Sorce <simo(a)redhat.com>