2.8 exec bug fix wanted - (nf)

[jpayne%bbn-vax at sri-unix.UUCP]

From:  Jonathan Payne <jpayne at bbn-vax>

Yes, we found that bug recently.  The fix is in getxfile:

		expand(ds, S_DATA);
		i = ds;
		while (--i)
			clearseg(u.u_procp->p_daddr + i);

Change the "while (--i)" to "while (--i > 0)"