Two missing Grahite graphs in nsqadmin on v0.2.16

We've hooked up Graphite to nsqd and it's looking good. All the graphs are populated _except_ the *depth* and *connections* graphs.

Example URL (with hostname switched out):

    render?yMin=0&target=scaleToSeconds%28summarize%28sumSeries%28stats_counts.nsq.our-hostname-here_4151.topic.event.channel.jstats.depth%29%2C"1min"%29%2C1%29&width=800&colorList=red&height=450&bgcolor=ff000000&from=-120min&until=-1min&fgcolor=999999

Looking in Graphite we have:

topic.foo.message_count
topic.foo.channel.bar.[deferred_count, in_flight_count, message_count, requeue_count, timeout_count]

(but no *depth* key)

Any ideas?