UFS_DIRHASH option has been broken from several days ago.

#   compile  NS/ufs_dirhash.o
/usr/tools/bin/i386--netbsdelf-gcc -ffreestanding -O2 -Werror -Wall -Wno-main -Wno-format-zero-length -Wpointer-arith -Wmissing-prototy
pes -Wstrict-prototypes -Wreturn-type -Wswitch -Wshadow -Wcast-qual -Wwrite-strings -Wno-sign-compare -fno-zero-initialized-in-bss -Di3
86 -I. -I/usr/src/sys/arch -I/usr/src/sys -nostdinc -DLKM -DMAXUSERS=64 -D_KERNEL -D_KERNEL_OPT -I/usr/src/sys/lib/libkern/../../../com
mon/lib/libc/quad -I/usr/src/sys/lib/libkern/../../../common/lib/libc/string -I/usr/src/sys/lib/libkern/../../../common/lib/libc/arch/i
386/string -I/usr/src/sys/dist/ipf -c /usr/src/sys/ufs/ufs/ufs_dirhash.c
/usr/src/sys/ufs/ufs/ufs_dirhash.c: In function `ufsdirhash_build':
/usr/src/sys/ufs/ufs/ufs_dirhash.c:166: error: case label does not 
reduce to an integer constant
/usr/src/sys/ufs/ufs/ufs_dirhash.c:168: error: case label does not 
reduce to an integer constant

*** Failed target:  ufs_dirhash.o

---
Shin-ichi YOSHIMOTO <yosimoto@waishi.jp>