Don't duplicate the data for common GameButtons.

InputScheme separates the generic, low-level engine data
from the Game*-specific high-level data.  GameButtonType
is a high-level distinction; in fact, it's only needed
for custom GameButtons (eg. DANCE_BUTTON_*), since the
function of generic GameButtons (GAME_BUTTON_*) can simply
be identified by their value--that's why, for example, we
don't have GameButtonType for GAME_BUTTON_COIN.

stepmania/src/GameInput.cpp

@@ -16,7 +16,7 @@ StringToX( GameController );
 
 RString GameButtonToString( const InputScheme* pInputs, GameButton i )
 {
-	return pInputs->m_GameButtonInfo[i].m_szName;
+	return pInputs->GetGameButtonName(i);
 }
 
 RString GameButtonToLocalizedString( const InputScheme* pInputs, GameButton i )