[MarvinPWN]

You must delete this value of the variable if the weapon is empty.
Put this into OnPlayerWeaponShot:

PHP код:

new Waffe[7],Ammo[8];
for(new i;i<12;i++)
{
    if(i < 10 && i > -1)
    {
        format(Waffe,sizeof Waffe,"pGun0%i",i);
        format(Ammo,sizeof Ammo,"pAmmo0%i",i);
    }
    else if(i >= 10)
    {
        format(Waffe,sizeof Waffe,"pGun%i",i);
        format(Ammo,sizeof Ammo,"pAmmo%i",i);
    }
    if(PlayerInfo[playerid][Waffe] == weaponid)
    {
        if(PlayerInfo[playerid][Ammo] > 0)
        {
            PlayerInfo[playerid][Ammo] --;
        }
        if(PlayerInfo[playerid][Ammo] == 0)
        {
            PlayerInfo[playerid][Ammo] = 0;
            PlayerInfo[playerid][Waffe] = 0;
        }
    }
} 


Maybe it is not the best solution but it work.