Edge case breaking summary stats output

[jrcpulliam]

When both the upper and lower bound of the latest estimate are 0, log_cases is set to NA in summarise.R (lines 311-312; 0/0 > 1000 returns NA, instead of a logical).

This produces an error when generating summary statistics: "Error in if (log_cases) {: missing value where TRUE/FALSE needed"

[seabbs]

Thanks @jrcpulliam for reporting.

That does sound like an edge case we haven't considered. Will get on fixing that!