C-x - in empty buffer signals beginning-of-buffer

[Kalle Olavi Niemitalo]

In GNU Emacs 20.7.2 (i386-debian-linux-gnu, X toolkit)
 of Fri Apr 13 2001 on PC486
configured using `configure  i386-debian-linux-gnu --prefix=/usr 
--sharedstatedir=/var/lib --libexecdir=/usr/lib --localstatedir=/var/lib 
--infodir=/usr/share/info --with-pop=yes --with-x=yes --with-x-toolkit=yes'

If I run C-x - (shrink-window-if-larger-than-buffer) in an empty
buffer, it signals a `beginning-of-buffer' error.  I'd like it to
instead shrink the window to `window-min-height' lines, like it
does if the buffer contains a space.  The error is particularly
annoying when trying to shrink the window of an asynchronous
shell command that hasn't output anything yet.

Recent input:
ESC d ESC d ESC b ESC b ESC b ESC b ESC O D ESC d C-c 
C-c ESC O B ESC O B ESC O B q g ESC x v e r s i o n 
RET ESC x C-g ESC ! f i n d SPC C-g C-x C-f C-g ESC 
! f i n d SPC - n a m e SPC r u l e s SPC & RET C-x 
o C-x - C-x - ESC x r e p o r t SPC e m a c s SPC b 
u g RET

Recent messages:
Reading active file via nnml...
Reading active file via nnml...done
Checking new news...
Checking new news...done
GNU Emacs 20.7.2 (i386-debian-linux-gnu, X toolkit) of Fri Apr 13 2001 on PC486
Quit [3 times]
Beginning of buffer
find -name rules: finished.
Loading emacsbug...
Loading emacsbug...done