Merge pull request 'Only save/load files for the server' (#6) from Lonsfor/srb2k-leaderboard:lonsfor-patch-3 into master

Reviewed-on: #6

leaderboard.lua

@@ -272,8 +272,9 @@ local function stat_str(stat)
 end
 
 -- Read the leaderboard
-local f = io.open(FILENAME, "r")
-if f then
+if isserver then
+	local f = io.open(FILENAME, "r")
+	if f then
 		for l in f:lines() do
 			-- Leaderboard is stored in the following tab separated format
 			-- mapnum, name, skin, color, time, splits, flags, stat
@@ -324,8 +325,9 @@ if f then
 
 		sortScores()
 		f:close()
-else
+	else
 		print("Failed to open file: ", FILENAME)
+	end
 end
 
 function allowJoin(v)
@@ -1315,6 +1317,7 @@ local function saveTime(player)
 		StatTrack = true
 	end
 
+	if isserver then
 		local f = assert(io.open(FILENAME, "w"))
 		if f == nil then
 			print("Failed to open file for writing: " + FILENAME)
@@ -1339,6 +1342,7 @@ local function saveTime(player)
 		end
 
 		f:close()
+	end
 end
 
 -- DEBUGGING