While running some JunitTest, crashes on an attempt to delete entries
of an empty vector m_pImpl->m_pTable->m_pCellVector.

The entries are created on-demand by
AccessibleGridControlTable::getAccessibleChild(), so presumably that
hadn't been called yet when the rows were deleted.

Also fix bizarre abuse of all applicable variable naming conventions.

(regression from 2095b2e1)

Change-Id: Id2d70ca4601a166718629c0fe922f805dd72eec1