That was a good one Dick!  One of my 92/96s is without the notch, but it still holds the bolt back.  It likely won't always though.  I can get the bolt to go forward if I point the barrel down and tap on the butt of the rifle.  The pin hasn't worn the receiver yet, but it's about through the parkerizing.  The extractor is tightly fitted, like most everything on this particular rifle, which is likely why it holds the bolt back at all.