Fix crash when --in-peers & --out-peers both 0 (#14598)

substrate/client/service/src/builder.rs

@@ -785,12 +785,14 @@ where
 	};
 
 	let (state_request_protocol_config, state_request_protocol_name) = {
+		let num_peer_hint = net_config.network_config.default_peers_set_num_full as usize +
+			net_config.network_config.default_peers_set.reserved_nodes.len();
 		// Allow both outgoing and incoming requests.
 		let (handler, protocol_config) = StateRequestHandler::new(
 			&protocol_id,
 			config.chain_spec.fork_id(),
 			client.clone(),
-			net_config.network_config.default_peers_set_num_full as usize,
+			num_peer_hint,
 		);
 		let config_name = protocol_config.name.clone();