netfilter: nft_osf: simplify init path

Remove useless branch to check for errors in nft_parse_register_store().

Signed-off-by: Pablo Neira Ayuso <[e-mail]>
Signed-off-by: Florian Westphal <[e-mail]>

net/netfilter/nft_osf.c

···
 {
 	struct nft_osf *priv = nft_expr_priv(expr);
 	u32 flags;
-	int err;
 	u8 ttl;
 
 	if (!tb[NFTA_OSF_DREG])
···
 		priv->flags = flags;
 	}
 
-	err = nft_parse_register_store(ctx, tb[NFTA_OSF_DREG], &priv->dreg,
-				       NULL, NFT_DATA_VALUE,
-				       NFT_OSF_MAXGENRELEN);
-	if (err < 0)
-		return err;
-
-	return 0;
+	return nft_parse_register_store(ctx, tb[NFTA_OSF_DREG], &priv->dreg,
+					NULL, NFT_DATA_VALUE,
+					NFT_OSF_MAXGENRELEN);
 }
 
 static int nft_osf_dump(struct sk_buff *skb,