allow_ansi fix

[Konstantin Sobolev <kos@xxxxxxxxxxxxxxxxx>]

Hi,

mutt-1.5.11 doesn't correctly work with allow_ansi option: codes "[39m" 
(set foreground to defaut) and "[49m" (set background to default) ignore 
terminal settings and always use white and black colors respecitvely. 
Also, if only foreground color is set, background color stays 
initialized with 0 instead of default color. The same happens if only 
background color is specified, foreground stays 0. It isn't noticable 
when using default white-on-black terminal, but doesn't look too nice in 
a different color scheme.

Here's my attempt to fix the problem: 

--- pager.c.orig        2006-02-26 15:54:33.000000000 +0300
+++ pager.c     2006-02-26 15:54:36.000000000 +0300
@@ -908,6 +908,8 @@
       a->attr = ANSI_OFF;
       a->pair = -1;
     }
+    a->bg = -2;
+    a->fg = -2;
     while (pos < x)
     {
       if (buf[pos] == '1' && (pos+1 == x || buf[pos+1] == ';'))
@@ -948,7 +950,8 @@
 #endif
        a->pair = -1;
        a->attr |= ANSI_COLOR;
-       a->fg = buf[pos+1] - '0';
+       if (buf[pos + 1] != '9')
+         a->fg = buf[pos+1] - '0';
        pos += 3;
       }
       else if (buf[pos] == '4' && isdigit(buf[pos+1]))
@@ -959,7 +962,8 @@
 #endif
        a->pair = -1;
        a->attr |= ANSI_COLOR;
-       a->bg = buf[pos+1] - '0';
+       if (buf[pos + 1] != '9')
+         a->bg = buf[pos+1] - '0';
        pos += 3;
       }
       else 

brief comments: fg and bg colors are initialized with -2 from the very
beginning. -2 is COLOR_DEFAULT from color.c (should be probably moved to 
color.h) When back- or foreground colorcode is spotted, we check if it 
is an attempt to set a default color and change bg/fg value only when 
needed.
 
Here's sample screenshot before the patch:
ftp://80.70.228.198/misc/mutt1.png
and after the patch:
ftp://80.70.228.198/misc/mutt2.png

-- 
/KoS
* C is for Bangers.