Fixes small errors in handling players detection in mtwebmapper.

cmd/mtwebmapper/players.go

@@ -92,7 +92,7 @@ func (ps *players) readFromFIFO() ([]*player, error) {
 
 func samePlayers(a, b []*player) bool {
 	if len(a) != len(b) {
-		return true
+		return false
 	}
 	for i, p := range a {
 		if !p.same(b[i]) {
@@ -106,15 +106,20 @@ func (ps *players) run() {
 	for {
 		pls, err := ps.readFromFIFO()
 		if err != nil {
+			//log.Printf("err: %s\n", err)
 			time.Sleep(sleepInterval)
 			continue
 		}
 		if pls == nil {
+			//log.Println("no players")
 			continue
 		}
+		//log.Printf("%+q\n", pls)
 		sort.Sort(sortPlayersByName(pls))
 		var change bool
 		ps.mu.Lock()
+		//log.Printf("%+q\n", pls)
+		//log.Printf("%+q\n", ps.pls)
 		if change = !samePlayers(pls, ps.pls); change {
 			ps.pls = pls
 		}

mods/track_players/init.lua

@@ -2,7 +2,7 @@ local time_interval = 1.0
 local fifo_path = "/tmp/mt_players_fifo"
 
 function players_data()
-    ps = {}
+    local ps = {}
     for _, player in ipairs(minetest.get_connected_players()) do
         local pos = player:getpos()
         local pname = player:get_player_name()