ila: Fix uninitialised return value in ila_xlat_nl_cmd_flush

This patch fixes an uninitialised return value error in
ila_xlat_nl_cmd_flush.
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Fixes: 6c4128f6 ("rhashtable: Remove obsolete...")
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/ila/ila_xlat.c

@@ -383,7 +383,7 @@ int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info)
 	struct rhashtable_iter iter;
 	struct ila_map *ila;
 	spinlock_t *lock;
-	int ret;
+	int ret = 0;
 
 	rhashtable_walk_enter(&ilan->xlat.rhash_table, &iter);
 	rhashtable_walk_start(&iter);