fix channel name resolution

TradeSkillMaster_AuctionDB/Modules/ChannelSync.lua

@@ -71,10 +71,11 @@ end
 local function GetChannelDisplayName(channelName, channelString, channelNumber, channelBaseName)
 	if channelBaseName and channelBaseName ~= "" then return channelBaseName end
 	if channelName and channelName ~= "" then return channelName end
-	if type(channelString) == "number" then
-		return select(2, GetChannelName(channelString))
-	end
 	if channelString and channelString ~= "" then
+		local numeric = tonumber(channelString)
+		if numeric then
+			return select(2, GetChannelName(numeric))
+		end
 		return channelString:match("^%d+%.%s*(.+)$") or channelString
 	end
 	if channelNumber then