Function validate_seed_config

plugins/seedwatch.cpp:88–101

// it can be removed once saves from 50.09 are no longer loadable

static bool validate_seed_config(color_ostream& out, PersistentDataItem c)
{
    int seed_id = c.get_int(SEED_CONFIG_ID);
    auto plant = df::plant_raw::find(seed_id);
    if (!plant) {
        WARN(control,out).print("discarded invalid seed id: {}\n", seed_id);
        return false;
    }
    bool valid = (!plant->flags.is_set(df::enums::plant_raw_flags::TREE));
    if (!valid) {
        DEBUG(control, out).print("invalid configuration for {} discarded\n", plant->id);
    }
    return valid;
}

static const int32_t CYCLE_TICKS = 1229;
static int32_t cycle_timestamp = 0;  // world->frame_counter at last cycle