Add: Houses can accept up to 16 different cargo types via NewGRF.

New Action0 property 23 for feature 07, variable length, format B n*(B B). Initial byte is number of structures following. First byte in structure is cargo id, second is acceptance level in 1/8 units.

src/town_cmd.cpp

@@ -611,7 +611,7 @@ static inline void AddAcceptedCargoSetMask(CargoID cargo, uint amount, CargoArra
 static void AddAcceptedCargo_Town(TileIndex tile, CargoArray &acceptance, CargoTypes *always_accepted)
 {
 	const HouseSpec *hs = HouseSpec::Get(GetHouseType(tile));
-	CargoID accepts[3];
+	CargoID accepts[lengthof(hs->accepts_cargo)];
 
 	/* Set the initial accepted cargo types */
 	for (uint8 i = 0; i < lengthof(accepts); i++) {