Buildworld fail on ~ Mon Apr 5 12:30:00 EDT 2004 snapshot

Make buildworld from 5.2.1-R to current snapshot.

===> sys/boot/i386/cdboot
as  -o cdboot.o /usr/src/sys/boot/i386/cdboot/cdboot.s
cc -O -pipe -march=pentium4 -ffreestanding -mpreferred-stack-boundary=2 
-N -e start -Ttext 0x7c00 -nostdlib -o cdboot.out cdboot.o
objcopy -S -O binary cdboot.out cdboot
===> sys/boot/i386/kgzldr
as  --defsym SIO_PRT=0x3f8 -o start.o /usr/src/sys/boot/i386/kgzldr/start.s
cc -Os -DKZIP -ffreestanding -mpreferred-stack-boundary=2  -c
/usr/src/sys/boot/i386/kgzldr/boot.c
cc -Os -DKZIP -ffreestanding -mpreferred-stack-boundary=2  -c
/usr/src/sys/kern/inflate.c
cc -Os -DKZIP -ffreestanding -mpreferred-stack-boundary=2  -c
/usr/src/sys/boot/i386/kgzldr/lib.c
as  --defsym SIO_PRT=0x3f8 -o crt.o /usr/src/sys/boot/i386/kgzldr/crt.s
as  --defsym SIO_PRT=0x3f8 -o sio.o /usr/src/sys/boot/i386/kgzldr/sio.s
cc -Os -DKZIP -ffreestanding -mpreferred-stack-boundary=2  -Wl,-r
-nostdlib -static -o kgzldr.o start.o boot.o inflate.o lib.o crt.o sio.o
===> sys/boot/i386/libi386
cc -O -pipe -march=pentium4 -DCOMPORT=0x3f8 -DCOMSPEED=9600 -DTERM_EMU
-I/usr/src/sys/boot/i386/libi386/../../common
-I/usr/src/sys/boot/i386/libi386/../btx/lib 
-I/usr/src/sys/boot/i386/libi386/../../../contrib/dev/acpica 
-I/usr/src/sys/boot/i386/libi386/../../.. -I.
-I/usr/src/sys/boot/i386/libi386/../../../../lib/libstand/ -ffreestanding
-mpreferred-stack-boundary=2  -c /usr/src/sys/boot/i386/libi386/biosacpi.c
In file included from /usr/src/sys/contrib/dev/acpica/acfreebsd.h:165,
                 from /usr/src/sys/boot/i386/libi386/biosacpi.c:34:
/usr/obj/usr/src/i386/usr/include/ctype.h:88: error: syntax error before
"int"
*** Error code 1

Stop in /usr/src/sys/boot/i386/libi386.
*** Error code 1