bgpd: null check (Coverity 1472237)

Signed-off-by: F. Aragon <paco@voltanet.io>

bgpd/bgp_table.c

@@ -144,9 +144,6 @@ void bgp_table_range_lookup(const struct bgp_table *table, struct prefix *p,
 	struct bgp_node *node = bgp_node_from_rnode(table->route_table->top);
 	struct bgp_node *matched = NULL;
 
-	if (node == NULL)
-		return;
-
 	while (node && node->p.prefixlen <= p->prefixlen
 	       && prefix_match(&node->p, p)) {
 		if (node->info && node->p.prefixlen == p->prefixlen) {
@@ -157,6 +154,9 @@ void bgp_table_range_lookup(const struct bgp_table *table, struct prefix *p,
 			&p->u.prefix, node->p.prefixlen)]);
 	}
 
+	if (node == NULL)
+		return;
+
 	if ((matched == NULL && node->p.prefixlen > maxlen) || !node->parent)
 		return;
 	else if (matched == NULL)