/// reset_map()
writelog("Reset map start");
i = 0;
repeat (80) {
    j = 0;
    repeat (80) {
        writelog("Resetting " + string(i) + "," + string(j));
        global.map[i, j] = "0";
        global.dmap[i, j] = 0;
        j += 1;
    }
    i += 1;
}
writelog("Reset map end");