window-min-height not obeying its documentation in Emacs 22.1

[Joe Wells <jbw@macs.hw.ac.uk>]

I have window-min-height set to 4.  According to its documentation,
any window whose height is less than 4 will be deleted.  This is false
when the value split-height-threshold is small enough.  The following
script reproduces the bug (at least with my screen height).

----------------------------------------------------------------------
#!/bin/sh
~/local2/bin/emacs --quick --eval '(progn (split-window-vertically) (temp-buffer-resize-mode 1) (setq window-min-height 4) (setq split-height-threshold 4) (describe-bindings))'
#
# You will now see a window that is 1 line tall and is missing its
# mode line.  This should be impossible according to the documentation
# of window-min-height.
----------------------------------------------------------------------

This may just be a documentation bug.  But I would really like for
window-min-height to obey its documentation, as I get very confused by
windows that are missing their mode lines because they are only 1 line
tall.

Joe

----------------------------------------------------------------------
In GNU Emacs 22.1.1 (i686-pc-linux-gnu, GTK+ Version 2.8.20)
 of 2007-06-27 on artemis
Windowing system distributor `The X.Org Foundation', version 11.0.70000000
configured using `configure  '--prefix=/home/jbw/local2' '--enable-debug' '--disable-nls' '--with-x-toolkit=gtk' 'CFLAGS=-O0 -g3 -ggdb''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: en_US.UTF-8
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: jbw
  value of $LANG: nil
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t