MenuButton crash

[anaselli]

Compile and execute the MenuButton example to have a test case.
Then run it for ncurses plugin (e.g. ./MenuButtons --ncurses for instance)
Select Menu, then Menu 1 (e.g cursor down and then cursor left) as in picture below

Then press up cursor or ESC to skip this menu and to be back to upper one.
Now select a menu item and it crashes: