I just run into this as well. You need to update pico.

On Sun, Dec 15, 2002 at 10:19:33AM -0500, Kimmo Suominen wrote:
> 
> >Number:         19395
> >Category:       pkg
> >Synopsis:       pine-4.51 does not compile
> >Confidential:   no
> >Severity:       critical
> >Priority:       high
> >Responsible:    pkg-manager
> >State:          open
> >Class:          sw-bug
> >Submitter-Id:   net
> >Arrival-Date:   Sun Dec 15 07:20:00 PST 2002
> >Closed-Date:
> >Last-Modified:
> >Originator:     Kimmo Suominen
> >Release:        NetBSD 1.6F (2002-08-09) / pkgsrc 2002-12-15
> >Organization:
>  _   _
> | |_(_)_ __
> | / / | '  \   Kimmo Suominen
> |_\_\_|_|_|_|  kim@tac.nyc.ny.us
> >Environment:
> System: NetBSD nix.gw.com 1.6F NetBSD 1.6F (GW-GENERIC) #59: Fri Aug 9 16:53:01 EDT 2002 kim@nix.gw.com:/net/beowulf/src-1/NetBSD/cvsroot/src/sys/arch/i386/compile/GW-GENERIC i386
> Architecture: i386
> Machine: i386
> >Description:
> Pine (4.51) does not compile on NetBSD/i386 1.6F (2002-08-09)
> 
> usr/pkg/lib -L/usr/pkg/lib   -DDEBUG -DDEBUGJOURNAL    -DNETBSD -DSYSTYPE=\"NEB\" -DMOUSE -I/usr/pkg/include/c-client  -c reply.c
> reply.c: In function `signature_edit':
> reply.c:5626: structure has no member named `always_spell_check'
> reply.c: In function `signature_edit_lit':
> reply.c:5812: structure has no member named `always_spell_check'
> reply.c: In function `standard_picobuf_setup':
> reply.c:5989: structure has no member named `home_dir'
> *** Error code 1
> 
> >How-To-Repeat:
> cd /usr/pkgsrc/mail/pine
> make ACCEPTABLE_LICENSES=pine-license
> >Fix:
> >Release-Note:
> >Audit-Trail:
> >Unformatted:
-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 23 ans d'experience feront toujours la difference
--