Don't play the Start sound in SM_BeginFadingOut. It might

have been triggered by something that just played a sound,
or the screen might want to play a different sound.  It's
not SM_BeginFadingOut's job to play a sound.

(fixes double-start sound when "next screen" options are
selected from context menus in ScreenOptionsManage*)

stepmania/src/ScreenOptionsEditCourseEntry.cpp

@@ -456,6 +456,7 @@ void ScreenOptionsEditCourseEntry::ProcessMenuStart( const InputEventPlus &input
 		break;
 	case ROW_SET_MODS:
 	case ROW_DONE:
+		SCREENMAN->PlayStartSound();
 		ScreenOptions::BeginFadingOut();
 		break;
 	}