fix "arcade options navigation goes to next screen on Start"

stepmania/src/ScreenOptions.cpp

@@ -1127,10 +1127,12 @@ void ScreenOptions::MenuStart( PlayerNumber pn, const InputEventType type )
 				else if( bAllOnExit && type == IET_FIRST_PRESS )
 					StartGoToNextState();
 			}
+			break;
 		case NAV_THREE_KEY_MENU:
 		case NAV_FIVE_KEY:
 			if( type == IET_FIRST_PRESS )	// m_SMOptionsNavigation
 				StartGoToNextState();
+			break;
 		}
 	}
 }