in do_scroll_up() and do_scroll_down(), fix problems where, after
scrolling, the previous and current lines would not be updated properly
if the current line was not the first or last line of the edit window


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3762 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
2 files changed