host: Don't display EndedAt if zero
host: Don't display EndedAt if zero

Signed-off-by: Joseph Glanville <aed65cdb66c1129f81e57d35b788d35820e08ea4@jpg.id.au>

rikur/flynn,josephglanville/flynn,philiplb/flynn,philiplb/flynn,rikur/flynn,philiplb/flynn,lmars/flynn,rikur/flynn,benbjohnson/flynn,flynn/flynn,rikur/flynn,flynn/flynn,lmars/flynn,benbjohnson/flynn,benbjohnson/flynn,josephglanville/flynn,josephglanville/flynn,josephglanville/flynn,flynn/flynn,josephglanville/flynn,lmars/flynn,flynn/flynn,rikur/flynn,lmars/flynn,rikur/flynn,benbjohnson/flynn,flynn/flynn,philiplb/flynn,josephglanville/flynn,benbjohnson/flynn,benbjohnson/flynn,lmars/flynn,philiplb/flynn