off by one in wrapping long lines in bash-3.1

[Mike Frysinger]

Configuration Information:
Machine: x86_64
OS: linux-gnu
Compiler: x86_64-pc-linux-gnu-gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu' 
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib   -O2 -march=k8 -pipe 
-D_FORTIFY_SOURCE=1
uname output: Linux vapier 2.6.14.3-grsec #4 PREEMPT Wed Dec 21 16:10:15 EST 
2005 x86_64 AMD Athlon(tm) 64 Processor 3500+ AuthenticAMD GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 3.1
Patch Level: 5
Release Status: release

Description:
when you first launch bash-3.1, the long-line wrapping ability appears to be 
broken.  very long lines at first will start to wrap one character too soon 
and overwrite the current line rather than start on the next line.  resizing 
the terminal, executing a program, or similar operations appear to "fix" the 
issue, it's just the initial run where things are screwed up.  observered on 
both Gentoo and Debian.  bash-3.0 works correctly.

Repeat-By:
 - run 'bash'
 - hold down a letter until it gets to the edge of the terminal
 - observe the line wrapping too soon and overwriting current line
 - hit enter/resize terminal/etc...
 - hold down a letter until it gets to the edge of the terminal
 - observe the line wrapping properly now
-mike