For Big5 output from legacy softwate compatible, we have to assume the
box drawing characters as full width (from patching screen and/or locale).
However, this will breaks the ``real'' dialog, like dialog(1) under FreeBSD.
This patch translate those ansi box drawing characters into poorman's 
drawing (using +, -, |). It will make my life easier.

ref: http://www.robelle.com/smugbook/linedraw.html
--- encoding.c.orig2	Thu May 18 23:15:45 2006
+++ encoding.c	Thu May 18 23:24:42 2006
@@ -102,21 +102,21 @@
   { 0x0067, 0x00B1 },
   { 0x0068, 0x2424 },
   { 0x0069, 0x240B },
-  { 0x006a, 0x2518 },
-  { 0x006b, 0x2510 },
-  { 0x006c, 0x250C },
-  { 0x006d, 0x2514 },
-  { 0x006e, 0x253C },
+  { 0x006a, 0x2b }, /* Lower right corner */
+  { 0x006b, 0x2b }, /* Upper right corner */
+  { 0x006c, 0x2b }, /* Upper left corner */
+  { 0x006d, 0x2b }, /* Lower left corner */
+  { 0x006e, 0x2b }, /* Cross center lines */
   { 0x006f, 0x23BA },
   { 0x0070, 0x23BB },
-  { 0x0071, 0x2500 },
+  { 0x0071, 0x2d }, /* Horizontal line */
   { 0x0072, 0x23BC },
   { 0x0073, 0x23BD },
-  { 0x0074, 0x251C },
-  { 0x0075, 0x2524 },
-  { 0x0076, 0x2534 },
-  { 0x0077, 0x252C },
-  { 0x0078, 0x2502 },
+  { 0x0074, 0x2b }, /* Left tee */
+  { 0x0075, 0x2b }, /* Right tee */
+  { 0x0076, 0x2b }, /* Bottom tee */
+  { 0x0077, 0x2b }, /* Top tee */
+  { 0x0078, 0x7c }, /* Vertical line */
   { 0x0079, 0x2264 },
   { 0x007a, 0x2265 },
   { 0x007b, 0x03C0 },