A change to the curses interface from three years ago to make sure
that round-off didn't make the horizontal and vertical clipped map
indicators appear to not be clipped was using ROWNO for both instead
of COLNO for the horizontal one. For modest clipping the mistake
was unnoticeable; I don't know whether that remained true for more
extreme clipping.
[Not fixed: the curses scrollbar stuff ignores the fact that map
column 0 is unused.]
3dea129a38