Fix JSON null players

Author: ldilley

composer.json

@@ -1,6 +1,6 @@
 {
   "name": "fragland/minestat",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "type": "library",
   "description": "A Minecraft server status checker",
   "keywords": ["Minecraft","status"],

minestat.php

@@ -21,7 +21,7 @@
 
 class MineStat
 {
-  const VERSION = "3.0.0";            // MineStat version
+  const VERSION = "3.0.1";            // MineStat version
   const NUM_FIELDS = 6;               // number of values expected from server
   const NUM_FIELDS_BETA = 3;          // number of values expected from a 1.8b/1.3 server
   const MAX_VARINT_SIZE = 5;          // maximum number of bytes a varint can be
@@ -610,8 +610,8 @@ public function json_request()
       $this->version = @$json_data['version']['name'];
       $this->motd = @$json_data['description'];
       $this->strip_motd();
-      $this->current_players = (int)@$json_data['players']['online'];
-      $this->max_players = (int)@$json_data['players']['max'];
+      $this->current_players = (int)@$json_data['players']['online'] ?? -1;
+      $this->max_players = (int)@$json_data['players']['max'] ?? -1;
       $this->favicon_b64 = @$json_data['favicon'];
       if(isset($this->favicon_b64))
       {