batsys: don't return 0 if only rate is missing

batsys.lua

@@ -57,14 +57,14 @@ local function worker(format, batid)
         return {battery_state["Unknown\n"], 0, "N/A"}
     end
 
-    -- Get charge information
-    if battery.current_now then rate = battery.current_now
-    else return {battery_state["Unknown\n"], 0, "N/A"} end
-
-
     -- Calculate percentage (but work around broken BAT/ACPI implementations)
     local percent = math.min(math.floor(remaining / capacity * 100), 100)
 
+
+    -- Get charge information
+    if battery.current_now then rate = battery.current_now
+    else return {state, percent, "N/A"} end
+
     -- Calculate remaining (charging or discharging) time
     if state == "+"then
         timeleft = (tonumber(capacity) - tonumber(remaining)) / tonumber(rate)