SPIGOT-1308: Fix typo in PlayerList#sendAll

nms-patches/PlayerList.patch

@@ -734,7 +734,7 @@
 +
 +    public void sendAll(Packet packet, World world) {
 +        for (int i = 0; i < world.players.size(); ++i) {
-+            ((EntityPlayer) this.players.get(i)).playerConnection.sendPacket(packet);
++            ((EntityPlayer) world.players.get(i)).playerConnection.sendPacket(packet);
 +        }
 +
 +    }