[PKT_SCHED]: act_api: Fix module leak while flushing actions

Module reference needs to be given back if message header
construction fails.
Signed-off-by: NThomas Graf <tgraf@suug.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/act_api.c

@@ -602,8 +602,8 @@ static int tca_action_flush(struct rtattr *rta, struct nlmsghdr *n, u32 pid)
 	return err;
 
 rtattr_failure:
-	module_put(a->ops->owner);
 nlmsg_failure:
+	module_put(a->ops->owner);
 err_out:
 	kfree_skb(skb);
 	kfree(a);