Use Enums instead of hardcoded values

module_bags.lua

@@ -18,7 +18,7 @@ function child:scanBag(bag)
 		if(item) then
 			local itemInfo = C_Container.GetContainerItemInfo(bag, slot)
             local id = item:GetItemID()
-            if(id) then
+            if(itemInfo and id) then
                 empty = false
                 itemlist[id] = itemlist[id] or {}
                 itemlist[id]['count'] = itemlist[id]['count'] or 0
@@ -35,11 +35,11 @@ local function scanAllBags(delayed)
 	local playerID = child.getPID()
 	if(playerID) then
 		local tab = modul['db'][playerID]
-		for bag=0,4 do
+		for bag=Enum.BagIndex.Backpack ,Enum.BagIndex.ReagentBag do
 			tab[bag] = child:scanBag(bag) -- loop all bought bags
 		end
 		for k,v in pairs(modul['db'][playerID]) do
-			if(k<0 or k>4) then
+			if(k<Enum.BagIndex.Backpack or k>Enum.BagIndex.ReagentBag) then
 				tab[k] = nil -- prevent bogus bags
 			end
 		end