netfilter: xtables: shorten up return clause

The return value of nf_ct_l3proto_get can directly be returned even in
the case of success.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/net/netfilter/xt_connbytes.c b/net/netfilter/xt_connbytes.c
index 2ff332e..ff738a5 100644
--- a/net/netfilter/xt_connbytes.c
+++ b/net/netfilter/xt_connbytes.c
@@ -109,13 +109,10 @@
 		return -EINVAL;
 
 	ret = nf_ct_l3proto_try_module_get(par->family);
-	if (ret < 0) {
+	if (ret < 0)
 		pr_info("cannot load conntrack support for proto=%u\n",
 			par->family);
-		return ret;
-	}
-
-	return 0;
+	return ret;
 }
 
 static void connbytes_mt_destroy(const struct xt_mtdtor_param *par)