net: bridge: explicitly zero is_sticky in fdb_create

We need to explicitly zero is_sticky when creating a new fdb, otherwise
we might get a stale value for a new entry.

Fixes: 435f2e7cc0b7 ("net: bridge: add support for sticky fdb entries")
Signed-off-by: Nikolay Aleksandrov <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/bridge/br_fdb.c

···
 		fdb->added_by_user = 0;
 		fdb->added_by_external_learn = 0;
 		fdb->offloaded = 0;
+		fdb->is_sticky = 0;
 		fdb->updated = fdb->used = jiffies;
 		if (rhashtable_lookup_insert_fast(&br->fdb_hash_tbl,
 						  &fdb->rhnode,