yet more -current build failures

In make buildkernel

...

cc -O -pipe -march=athlon-xp -DUSE_INET6
-I/usr/src/sys/modules/ipfilter/../../contrib/ipfilter -DIPFILTER=1
-DIPFILTER_LKM -DIPFILTER_LOG -DPFIL_HOOKS  -D_KERNEL -DKLD_MODULE
-nostdinc -I-  -I/usr/src/sys/modules/ipfilter/../../contrib/ipfilter
-include /usr/obj/usr/src/sys/LAPPY/opt_global.h -I. -I_at_ -I_at_/contrib/altq
-I_at_/../include -finline-limit=8000 -fno-common 
-I/usr/obj/usr/src/sys/LAPPY -mno-align-long-strings
-mpreferred-stack-boundary=2 -ffreestanding -Wall -Wredundant-decls
-Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith
-Winline -Wcast-qual  -fformat-extensions -std=c99 -c
/usr/src/sys/contrib/ipfilter/netinet/ip_auth.c
/usr/src/sys/contrib/ipfilter/netinet/ip_auth.c: In function `fr_auth_ioctl':
/usr/src/sys/contrib/ipfilter/netinet/ip_auth.c:372: error: `s' undeclared
(first use in this function)
/usr/src/sys/contrib/ipfilter/netinet/ip_auth.c:372: error: (Each
undeclared identifier is reported only once
/usr/src/sys/contrib/ipfilter/netinet/ip_auth.c:372: error: for each
function it appears in.)
/usr/src/sys/contrib/ipfilter/netinet/ip_auth.c:448: error: wrong type
argument to unary exclamation mark
*** Error code 1

Stop in /usr/src/sys/modules/ipfilter.
*** Error code 1