[boost] wave lexed_tokens sample has a lexing error on an empty file

From: Leo Davis (ldavis_at_[hidden])
Date: 2007-03-20 19:34:42

Hello,

I pulled down a copy of boost 1.34 from CVS today and built the
lexed_tokens sample.  It seemed to work well, except for running it on
an empty file:

$./lexed_tokens bar.c
bar.c(1): error: generic lexing error: invalid character '\000' in input
stream
$

This used to work in boost 1.33.1:

$ ./lexed_tokens bar.c
EOF              (#402) at bar.c (  1/ 1): ><
$

Leo