Bigtile mode patch for Angband 3.0.0 by Mogami

bigtile-v300.diff 

This patch will do some hacking mainly on cave.c, z-term.c, and main-xxx.c.
Currently this patch support main-x11.c main-xaw.c main-win.c main-mac.c.

Linux and win port is tested. But mac port is not yet tested; probably
no problem, because Hengband and ToME 2.0.0 cvs already have this
patch, and no serious bug.

Technical note about this patch:

1. (defines.h)

 PANEL_WID and SCREEN_WID will be changed to;

#define PANEL_WID	(use_bigtile ? 16 : 33)
#define SCREEN_WID	((Term->wid - COL_MAP - 1) / (use_bigtile ? 2 : 1))

2. (lite_spot(), print_rel(), prt_map() and display_map() in cave.c)

 Each tile will be placed on two byte of screen space; first byte is
 originaly attr/char pair and second byte will be dummy data 255/255.

3. (z-term.c) A few modification to refresh/remove bigtile correctly.

4. (main-x11.c main-xaw.c main-win.c main-mac.c)

 - Draw double width tile; location of each tile need not to be
   modified, because of second byte dummy char which is ignored.

 - Double width cursor; Sadly, current Term_curs_xxx() need to read
   information directry from Term->old->a[][] to decide whether cursor
   is to be doubled or not. To fix this dependence, maybe we need to
   add a boolean argument to this function. (Nuke me!)

 - When we change Bigtile mode from menu item, we need to redraw whole
   screen; I had inserted Term_key_push(KTRL('R')); only in
   main-win.c.  Since this code may have some problem, I had not
   inserted it in main-mac.c. But win port seems to work completely.


 Mogami