curses map window

tty ignores map column #0 (0-based index), like the core, and draws
the map in screen columns 1 (1-based index) through 79, leaving screen
column 80 blank.  curses was drawing all 80 map columns and since #0
was always unused, screen column 1 was blank and the map was shown in
2 through 80.  Change curses to work like tty.

This was too easy; there may be problems lurking.  One known issue: it
should be made smarter about when clipping/panning is necessary since
it thinks that a full 80 columns are needed but 79 suffice.

doc/fixes36.3

@@ -1,4 +1,4 @@
-$NHDT-Branch: NetHack-3.6 $:$NHDT-Revision: 1.56 $ $NHDT-Date: 1560611967 2019/06/15 15:19:27 $
+$NHDT-Branch: NetHack-3.6 $:$NHDT-Revision: 1.57 $ $NHDT-Date: 1560855142 2019/06/18 10:52:22 $
 
 This fixes36.3 file is here to capture information about updates in the 3.6.x
 lineage following the release of 3.6.2 in May 2019. Please note, however,
@@ -128,6 +128,7 @@ curses: don't convert ^M (or <return> or <enter> key) into ^J; both ^J and ^M
 	commands, ^J means run toward bottom of screen (when number_pad is
 	off) and ^M is not bound to any command, so accidental <return> won't
 	cause the hero to try to move
+curses: draw map in screen columns 1..79 like tty, rather than in 2..80
 curses+EDIT_GETLIN: when a prompt's answer was preloaded, using ESC to discard
 	it deleted it from the answer buffer but didn't erase it from screen
 tty: re-do one optimization used when status conditions have all been removed