slice层在compile的时候不报错，但是结果不对？
layer {
name: "conv7_mbox_conf_slice"
type: "Slice"
bottom: "conv7_mbox_conf_new"
top: "conv7_mbox_conf1"
top: "conv7_mbox_conf2"
top: "conv7_mbox_conf3"
top: "conv7_mbox_conf4"
slice_param {
axis: 1
slice_point: 2
slice_point: 4
slice_point: 6
}
}
