'Help' -> "List of game options." freezes the game

[tung]

To reproduce:

1. Select 'Help' from the L command window.
2. Choose 'List of game options.'
3. The prompt is dismissed, the map appears, but the touchscreen and buttons now do nothing.

It's a nasty surprise for those wanting to poke into the compiled-in options of NetHackDS. All of the other options under 'Help' display as expected and don't freeze the game.