An old, ugly, unused feature of 3D to auto-generate a name for a pointer to a struct causes unexpected shadowing.

In particular, say you have:

typedef struct _T {
  UINT32 x;
} T;

Then, 3D would also implicit bind the name PT to the type T*, this name can shadow the use of a PT already defined, leading to much confusion.

This PR fixes it by no longer auto-generating such a name, which is much more sane.