(#18): add viewport to gamehud

frontend/core/src/com/game/tankwars/view/GameHud.java

@@ -18,6 +18,8 @@ public class GameHud {
 
     private Stage stage;
 
+    private Viewport viewport;
+
     private Table table;
 
     private Skin skin;
@@ -37,6 +39,7 @@ public class GameHud {
     private HorizontalGroup moveContainer;
 
     public GameHud(Viewport viewport, SpriteBatch batch) {
+        this.viewport = viewport;
         stage = new Stage(viewport, batch);
 
         table = new Table();
@@ -84,6 +87,10 @@ public class GameHud {
         return stage;
     }
 
+    public Viewport getViewport() {
+        return viewport;
+    }
+
     public Skin getSkin() {
         return skin;
     }