Lock the life meter after failing.

If m_bTwoPlayerRecovery (normal): only lock and fail in FAIL_END_OF_SONG
if both players were failing at the same point.  (Before, FAIL_ARCADE
would pass as long as one player was passing at any given point,
but FAIL_END_OF_SONG would fail at the end if all players were failing
at any point, which made FAIL_END_OF_SONG harder than FAIL_ARCADE
in some cases.)

Don't show the danger animation in FAIL_OFF.

stepmania/src/StageStats.cpp

@@ -65,7 +65,7 @@ Grade StageStats::GetGrade( PlayerNumber pn )
 {
 	ASSERT( GAMESTATE->IsPlayerEnabled(pn) );	// should be calling this is player isn't joined!
 
-	if( bFailed[pn] )
+	if( bFailedEarlier[pn] )
 		return GRADE_E;
 
 	/* XXX: This entire calculation should be in ScoreKeeper, but final evaluation