Fix missing initialisation of extack in flow offload.
Fixes: c29f74e0df7a ("netfilter: nf_flow_table: hardware offload support")
Signed-off-by: Donald Hunter <donald.hunter@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
                                 struct list_head *block_cb_list)
 {
        struct flow_cls_offload cls_flow = {};
+       struct netlink_ext_ack extack = {};
        struct flow_block_cb *block_cb;
-       struct netlink_ext_ack extack;
        __be16 proto = ETH_P_ALL;
        int err, i = 0;