Fix OutfitterBar.lua for errors in change icon filter options

Both the change icon options to filter for your own spellbook and your bags cause errors currently in WotLK classic. Determined cause and added fixes. Also have logged issue as "WotLK Outfitter Icon selection bugs. cdmichaelb#143"

OutfitterBar.lua

@@ -1223,7 +1223,7 @@ function Outfitter.OutfitBar.TextureSets.Spellbook:Activate()
 
 		for _, professionID in ipairs(professions) do
 			local name, iconID = GetProfessionInfo(professionID)
-			if not usedIconIDs[iconID] then
+			if iconID and not usedIconIDs[iconID] then
 				table.insert(self.TextureList, iconID)
 				usedIconIDs[iconID] = true
 			end
@@ -1310,9 +1310,9 @@ function Outfitter.OutfitBar.TextureSets.Inventory:Activate()
 		local	vNumBagSlots = C_Container.GetContainerNumSlots(vBagIndex)
 
 		if vNumBagSlots > 0 then
-			for vSlotIndex = 1, vNumBagSlots do
-				local itemInfo = C_Containeer.GetContainerItemInfo(vBagIndex, vBagSlotIndex)
-				local vTexture = itemInfo.iconFileID
+			for vBagSlotIndex = 1, vNumBagSlots do
+				local itemInfo = C_Container.GetContainerItemInfo(vBagIndex, vBagSlotIndex)
+				local vTexture = itemInfo and itemInfo.iconFileID
 
 				if vTexture and not vUsedTextures[vTexture] then
 					table.insert(self.TextureList, vTexture)