ceph: fix divide error
ceph: fix divide error

Signed-off-by: Greg Smith <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@smith.gr>

stgraber/lxd,lxc/lxd,lxc/lxd,hallyn/lxd,atxwebs/lxd,hallyn/lxd,stgraber/lxd,Skarlso/lxd,Skarlso/lxd,atxwebs/lxd,mjeanson/lxd,pcdummy/lxd,lxc/lxd,pcdummy/lxd,stgraber/lxd,stgraber/lxd,mjeanson/lxd,atxwebs/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,stgraber/lxd,Skarlso/lxd,erikmack/lxd,erikmack/lxd,pcdummy/lxd,jsavikko/lxd,jsavikko/lxd,atxwebs/lxd,hallyn/lxd,hallyn/lxd,lxc/lxd,mjeanson/lxd,lxc/lxd,jsavikko/lxd,Skarlso/lxd,erikmack/lxd,lxc/lxd,hallyn/lxd,hallyn/lxd