Codechange: Use CargoArray for linkgraph refresher. (#13165)

`uint capacities[NUM_CARGO]` looks a lot like CargoArray.

src/linkgraph/refresh.cpp

@@ -70,8 +70,6 @@ LinkRefresher::LinkRefresher(Vehicle *vehicle, HopSet *seen_hops, bool allow_mer
 	vehicle(vehicle), seen_hops(seen_hops), cargo(INVALID_CARGO), allow_merge(allow_merge),
 	is_full_loading(is_full_loading)
 {
-	memset(this->capacities, 0, sizeof(this->capacities));
-
 	/* Assemble list of capacities and set last loading stations to 0. */
 	for (Vehicle *v = this->vehicle; v != nullptr; v = v->Next()) {
 		this->refit_capacities.push_back(RefitDesc(v->cargo_type, v->cargo_cap, v->refit_cap));

src/linkgraph/refresh.h

@@ -78,7 +78,7 @@ class LinkRefresher {
 	typedef std::set<Hop> HopSet;
 
 	Vehicle *vehicle;           ///< Vehicle for which the links should be refreshed.
-	uint capacities[NUM_CARGO]; ///< Current added capacities per cargo ID in the consist.
+	CargoArray capacities; ///< Current added capacities per cargo ID in the consist.
 	RefitList refit_capacities; ///< Current state of capacity remaining from previous refits versus overall capacity per vehicle in the consist.
 	HopSet *seen_hops;          ///< Hops already seen. If the same hop is seen twice we stop the algorithm. This is shared between all Refreshers of the same run.
 	CargoID cargo;              ///< Cargo given in last refit order.