Mario: mushroom interaction with Mario

mario/visitors/mario_visitor.cpp

@@ -58,6 +58,9 @@ void MarioVisitor::visit( const SDLPP::RenderObject &obj ) {
         newX = obj.getDoubleRect().first.getX() +
                obj.getDoubleRect().second.getX();
         break;
+    case MUSHROOM_ID:
+        mushroom = true;
+        break;
     default:
         break;
     }