query-stats: Handle the case where there are no queries.
query-stats: Handle the case where there are no queries.

lekkas/livegrep,lekkas/livegrep,lekkas/livegrep,wfxiang08/livegrep,wfxiang08/livegrep,wfxiang08/livegrep,paulproteus/livegrep,wfxiang08/livegrep,paulproteus/livegrep,wfxiang08/livegrep,lekkas/livegrep,lekkas/livegrep,paulproteus/livegrep,lekkas/livegrep,paulproteus/livegrep,paulproteus/livegrep,paulproteus/livegrep,wfxiang08/livegrep