Mmove local cv_teamchange to the top scope

No need to constantly look up the cvar when it can be saved

leaderboard.lua

@@ -12,6 +12,7 @@ local splits = {}
 local PATCH = nil
 local help = true
 local EncoreInitial = nil
+local cv_teamchange
 
 -- Tracks if stats have been written or not
 local StatTrack = false
@@ -1239,7 +1240,10 @@ local function think()
 		end
 	end
 
-	local cv_teamchange = CV_FindVar("allowteamchange")
+	if not cv_teamchange then
+		cv_teamchange = CV_FindVar("allowteamchange")
+	end
+
 	if p then
 		-- Scroll controller
 		-- Spectators can't input buttons so let the gamer do it
@@ -1290,7 +1294,12 @@ local function interThink()
 		COM_BufInsertText(server, "map " + nextMap)
 		nextMap = nil
 	end
-	if not CV_FindVar("allowteamchange").value then
+
+	if not cv_teamchange then
+		cv_teamchange = CV_FindVar("allowteamchange")
+	end
+
+	if not cv_teamchange.value then
 		allowJoin(true)
 	end
 end