Bug with gas pump

[TiRekS]

When take gas from pump, the amount of gas in pump does not change. 

There is a function in the ISTakeFuel

 

function ISTakeFuel:perform()
    while self.petrolCan:getUsedDelta() < 1 and tonumber(self.square:getProperties():Val("fuelAmount")) > 0 do
        self.petrolCan:setUsedDelta(self.petrolCan:getUsedDelta() + self.petrolCan:getUseDelta());
        -- FIXME: sync in multiplayer
        self.square:getProperties():Set("fuelAmount", (tonumber(self.square:getProperties():Val("fuelAmount")) - 1) .. "");
    end

    -- needed to remove from queue / start next.
    ISBaseTimedAction.perform(self);
end

 

and it looks like it does not work in SP too, because the level of gas is always 100(at least at the stations I tested).

Please, fix it.