Infinite troops in pickup zone set to 0 after troop drop

[dsanchezseco]

If in a pickup zone with infinite troops a group is dropped back the pickup zone counter is set to 0 (no troops available).

Problem, and solution, is that there is no check to see if the pickup has infinite troops before the sum(following line).

https://github.com/ciribob/DCS-CTLD/blob/9fe7020d6ddb49453f3abaf9314ed98b0568bebb/CTLD.lua#L4545

[dsanchezseco]

proposed solution

function ctld.updateZoneCounter(_index, _diff)

    if ctld.pickupZones[_index] ~= nil then

        -- only update counter if amount for pickupzone is not infinite(-1)
        if ctld.pickupZones[_index][3] >= 0 then

            ctld.pickupZones[_index][3] = ctld.pickupZones[_index][3] + _diff

            if ctld.pickupZones[_index][3] < 0 then
                ctld.pickupZones[_index][3] = 0
            end

            if ctld.pickupZones[_index][6] ~= nil then
                trigger.action.setUserFlag(ctld.pickupZones[_index][6], ctld.pickupZones[_index][3])
            end
        end
        --  env.info(ctld.pickupZones[_index][1].." = " ..ctld.pickupZones[_index][3])
    end
end