Filters patch compile bug

[Emmanuel <e allaud wanadoo fr>]

	Hi all,
I forgot a "bug" in libmutt/mutt_regex.h that gives you theses errors
In file included from filter-private.h:32,
                 from filter-file.c:35:
../libmutt/mutt_regex.h:49: syntax error before `REGEXP'
../libmutt/mutt_regex.h:50: syntax error before `REGEXP'
../libmutt/mutt_regex.h:51: syntax error before `REGEXP'
../libmutt/mutt_regex.h:52: syntax error before `REGEXP'
../libmutt/mutt_regex.h:53: syntax error before `REGEXP'

It's the "WHERE" macro that seems to be undefined or something I didn't
understand anyway: the way I corrected that is just to comment out the
WHERE macro (not the whole lines of course).
Here is the patch for that.

I'm sorry for that, and if someone else knows the good way to correct that,
he is welcome :)
Bye
Manu

mutt_regex.patch