* src/rtl/listbox.prg
! fixed nTop not being incremented in ListBox:hitTest() for no-box dropdown
* replaced inconsistent references to ::nTop with nTop
* renamed variables to better reflect their role
* src/rtl/listbox.prg
! fixed nTop not being incremented in ListBox:hitTest() for no-box dropdown
* replaced inconsistent references to ::nTop with nTop
* renamed variables to better reflect their role