🚀 go-pugleaf

According to page 3 of the USENIX Lime book, the following program
is incorrect:

----------------------------------------
class X {
protected:
   int prot;
};

class Y : public X {
   void mf ();
};

void Y::mf()
{
   prot = 2;
   X a;
   a.prot = 3; // error, prot is protected and a is not a Y!
   X *p = this;
   p->prot = 3; // error, prot is protected and p is not a pointer to Y!
}
----------------------------------------

However, g++ 1.32 does not complain about this.

Doug