In void wheel(int s, int mat)
change 
items[chars[currchar[s]].smeltitem].amount=items[chars[currchar[s]].tailitem].amount*4;
to
items[chars[currchar[s]].tailitem].amount=items[chars[currchar[s]].tailitem].amount*4;
and change this
{
senditem(m,chars[currchar[s]].tailitem);
} 
to
{
items[chars[currchar[s]].tailitem].priv=items[chars[currchar[s]].tailitem].priv|0x01;
senditem(m,chars[currchar[s]].tailitem);
}