K 10
svn:author
V 3
jmg
K 8
svn:date
V 27
2006-02-22T20:50:33.000000Z
K 7
svn:log
V 121
allow timo to be 0 when mtx is not NULL (KASSERT allowed this as
pointed out by jhb)

Reviewed by:	jhb
MFC after:	3 days

END