if(head.ammo_rockets) head.ammo_rockets = bound(head.ammo_rockets, head.ammo_rockets + 1, g_pickup_rockets_max);
if(head.ammo_shells) head.ammo_shells = bound(head.ammo_shells, head.ammo_shells + 2, g_pickup_shells_max);
if(head.ammo_nails) head.ammo_nails = bound(head.ammo_nails, head.ammo_nails + 5, g_pickup_nails_max);
if(head.ammo_rockets) head.ammo_rockets = bound(head.ammo_rockets, head.ammo_rockets + 1, g_pickup_rockets_max);
if(head.ammo_shells) head.ammo_shells = bound(head.ammo_shells, head.ammo_shells + 2, g_pickup_shells_max);
if(head.ammo_nails) head.ammo_nails = bound(head.ammo_nails, head.ammo_nails + 5, g_pickup_nails_max);