Minor quantity fix from previous commit

modules/game_npctrade/npctrade.lua

@@ -488,9 +488,11 @@ function checkSellAllTooltip()
   local first = true
 
   for key, amount in pairs(playerItems) do
-    if amount > 0 then
     local data = getTradeItemData(key, SELL)
-      if data and canTradeItem(data) then
+    if data then
+      amount = getSellQuantity(data.ptr)
+      if amount > 0 then
+        if data and amount > 0 then
           info = info..(not first and "\n" or "")..
                  amount.." "..
                  data.name.." ("..
@@ -501,6 +503,7 @@ function checkSellAllTooltip()
         end
       end
     end
+  end
   if info ~= '' then
     info = info.."\nTotal: "..total.." gold"
     sellAllButton:setTooltip(info)