radosgw-admin: fix infinite loop in 'datalog list'

affects datalog shards with more than 1000 entries

Fixes: https://tracker.ceph.com/issues/44751

Signed-off-by: Casey Bodley <cbodley@redhat.com>

src/rgw/rgw_admin.cc

@@ -8551,7 +8551,7 @@ int main(int argc, const char **argv)
     do {
       list<rgw_data_change_log_entry> entries;
       if (specified_shard_id) {
-        ret = datalog_svc->list_entries(shard_id, start_time.to_real_time(), end_time.to_real_time(), max_entries - count, entries, marker, NULL, &truncated);
+        ret = datalog_svc->list_entries(shard_id, start_time.to_real_time(), end_time.to_real_time(), max_entries - count, entries, marker, &marker, &truncated);
       } else {
         ret = datalog_svc->list_entries(start_time.to_real_time(), end_time.to_real_time(), max_entries - count, entries, log_marker, &truncated);
       }