npf crashes on empty hash table load (amd64)

[Geoff Wing <gcw%pobox.com@localhost>]

Hi,
using the following /etc/npf.conf and an empty file "/etc/npf_blacklist" 
I get a crash in hashinit(): "KASSERT(elements > 0);"

#10 0xffffffff80cf6365 in kern_assert (fmt=fmt@entry=0xffffffff810db938 "kernel %sassertion \"%s\" failed: file \"%s\", line %d ")
    at /usr/netbsd/src/sys/lib/libkern/kern_assert.c:51
#11 0xffffffff809950a4 in hashinit (elements=<optimized out>, htype=HASH_LIST, waitok=<optimized out>, hashmask=0xfffffe82dabaf920)
    at /usr/netbsd/src/sys/kern/subr_hash.c:93
#12 0xffffffff819494c9 in ?? ()
#13 0xfffffe82f2b094f0 in ?? ()
#14 0x0000000000000000 in ?? ()
----------------------------------------
/etc/npf.conf:

$ext1_if = inet4(msk0)
alg "icmp"
table <blacklist> type hash file "/etc/npf_blacklist"
group "external1" on $ext1_if {
	block in final from <blacklist>
}
group default {
	pass final on lo0 all
	block all
}
----------------------------------------

Regards,
Geoff