segfault in tab-completion menu if terminal is only one line tall

[Axel Beckert <abe@xxxxxxxxxxxxxxx>]

Hi,

this is a forward of http://bugs.debian.org/527110

--->8---
zsh version 4.3.9 segfaults when I have a terminal emulator open with
only one window available for the term and then do a tab completion.
Steps to reproduce below.

It should be mentioned that I've tried to reproduce the bug with 'zsh
-f', but I can't. Therefore I am attaching the output from the
Util/reporter script. The reason I'm mentioning this is because it
says bugs should be reproduced with the -f flag (in the README from
the source root dir) and if it can't the output from the Util/reporter
script (also from source root dir) should be included.

I can, however, reproduce the bug every time when not using the -f
flag. Steps to reproduce:

1. Open terminal emulator

2. Resize window so that there's only one line for the shell (i.e.
where the prompt also is).

3. Enter: ls <tab><tab> (that is, begin typing the 'ls' command, then
press tabulator twice to tab complete.)

[…]
---8<---

Later in the thread it became clear that the following commands are
necessary, too, if starting with just "zsh -f":

zstyle ':completion:*' menu select=long-list select=0
zstyle ':completion:*' select-prompt '%SScrolling active - %l%s'
autoload -Uz compinit
compinit

I can reproduce this issue with 5.0.5 as currently in Debian
Unstable/Testing. It initially has been reported against zsh 4.3.9.

		Kind regards, Axel
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