migration/rdma: Fix qemu_rdma_cleanup null check
If the migration fails before the channel is open (e.g. a bad
address) we end up in the cleanup with rdma->channel==NULL.
Spotted by Coverity: CID
1398634
Fixes:
fbbaacab2758cb3f32a0
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <
20190214185351.5927-1-dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>