guile 1.6.4 can not handle "empty else" of SRFI-0

[Sven Hartrumpf]

Hi all.

> guile --use-srfi="1"
guile> (cond-expand (srfi-1 (define a 1)) (else (define a 0)))
guile> a
1
% GOOD

guile> (cond-expand ((not srfi-1) (define b 1)) (else (define b 0)))
guile> b
0
% GOOD

guile> (cond-expand ((not srfi-1) (define b 1)) (else))
standard input:5:1: In procedure begin in expression (begin):
standard input:5:1: missing or extra expression
ABORT: (misc-error)

Type "(backtrace)" to get more information or "(debug)" to enter the debugger.
% VERY BAD :-(

Greetings
Sven