[patch] prompt handling bug exposed since bash30-006

[Tim Waugh]

Configuration Information [Automatically generated, do not change]:
Machine: i386
OS: linux-gnu
Compiler: i386-redhat-linux-gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i386' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i386-redhat-linux-gnu' 
-DCONF_VENDOR='redhat' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H  -I.  -I. -I./include -I./lib  -D_FILE_OFFSET_BITS=64 -O2 -g 
-pipe -m32 -march=i386 -mtune=pentium4
uname output: Linux gene 2.6.9-1.640 #1 Wed Oct 20 09:55:51 EDT 2004 i686 i686 
i386 GNU/Linux
Machine Type: i386-redhat-linux-gnu

Bash Version: 3.0
Patch Level: 14
Release Status: release

Description:
        The shell crashes when using 'read -e' while PS1 is set to a
        prompt longer than the screen width.  Original bug report:

        https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=139306

Repeat-By:
        bash
        PS1=$(perl -e 'print "a"x80')
        read -e FOO

Fix:

I don't know if this is correct, but it seems to fix the problem here
with no ill effects.  Please sanity check it!

This problem affects bash-3.0 patchlevel 6 and upwards.

--- bash-3.0/lib/readline/display.c.read-e-segfault     2004-11-15 
18:26:43.773691987 +0000
+++ bash-3.0/lib/readline/display.c     2004-11-15 18:28:49.871671242 +0000
@@ -492,6 +492,7 @@
        }
       line[out] = '\0';
       wrap_offset = local_len - prompt_visible_length;
+      prompt_physical_chars = local_len;
     }
   else
     {