Platform cleanup

core/src/io/anuke/mindustry/Vars.java

@@ -139,6 +139,7 @@ public class Vars implements Loadable{
     public static EntityCollisions collisions;
     public static DefaultWaves defaultWaves;
     public static LoopControl loops;
+    public static Platform platform;
 
     public static World world;
     public static Maps maps;