pq13881.st WITH LOCK ROW ON EDIT, WALKBACK WHEN DELETING LAST ROW

With lock row on edit checked for a multirow query, deleting the
last row will cause an Index out of Range walkback.  In the deleteRow
method, we try to lock the current index, but at this point it is 0.


After applying fixpak v4.02b, file in pq13881.st to fix the problem.