added safety check for bogus CS
added safety check for bogus CS

nakijun/vtp,markraz/vtp,markraz/vtp,markraz/vtp,nakijun/vtp,markraz/vtp,seanisom/vtp,nakijun/vtp,nakijun/vtp,nakijun/vtp,seanisom/vtp,seanisom/vtp,seanisom/vtp,markraz/vtp,seanisom/vtp