don't allow retry on battlemaps

leaderboard.lua

@@ -374,6 +374,12 @@ end
 
 local function retry(player, ...)
 	if doyoudare(player) then
+		-- Verify valid race level
+		if not (mapheaderinfo[gamemap].typeoflevel & (TOL_SP | TOL_RACE)) then
+			CONS_Printf(player, "Battle maps are not supported")
+			return
+		end
+
 		-- Prevents bind crash
 		if leveltime < 20 then
 			return