--- a/util/statistics.lua	Mon Jan 26 15:25:16 2015 +0100
+++ b/util/statistics.lua	Fri Jan 30 14:21:51 2015 +0000
@@ -8,7 +8,7 @@
 	local n = pc/100 * (length + 1);
 	local k, d = m_floor(n), n%1;
 	if k == 0 then
-		return arr[1];
+		return arr[1] or 0;
 	elseif k >= length then
 		return arr[length];
 	end