Created a local variable for ProxiedPlayers

bungee/src/main/java/us/myles/ViaVersion/BungeePlugin.java

@@ -126,9 +126,10 @@ public class BungeePlugin extends Plugin implements ViaPlatform<ProxiedPlayer>,
 
     @Override
     public ViaCommandSender[] getOnlinePlayers() {
-        ViaCommandSender[] array = new ViaCommandSender[getProxy().getPlayers().size()];
+        Collection<ProxiedPlayer> players = getProxy().getPlayers();
+        ViaCommandSender[] array = new ViaCommandSender[players.size()];
         int i = 0;
-        for (ProxiedPlayer player : getProxy().getPlayers()) {
+        for (ProxiedPlayer player : players) {
             array[i++] = new BungeeCommandSender(player);
         }
         return array;