BUGFIX - EXCEPTION WHEN flag is added in path, resource transport changed=cancel

[p1plp1]

Building::cancel_transported_resource(Resource::Type res) {
if (res == Resource::TypeFish ||
res == Resource::TypeMeat ||
res == Resource::TypeBread) {
res = Resource::GroupFood;
}
causes error because this comparsion if (stock[i].type == res) is nonsense and causes in_stock = -1 that throws throw ExceptionFreeserf( .....