No brattery - no pop up

This small change disables popup notifications when the battery is disconnected.

battery-widget/battery.lua

@@ -157,7 +157,7 @@ local function worker(user_args)
             level_widget.text = string.format('%d%%', charge)
         end
 
-        if (charge >= 0 and charge < 15) then
+        if (charge >= 1 and charge < 15) then
             batteryType = "battery-empty%s-symbolic"
             if enable_battery_warning and status ~= 'Charging' and os.difftime(os.time(), last_battery_check) > 300 then
                 -- if 5 minutes have elapsed since the last warning