From 7163d50ce6e5deaefaa32f9a6d0bbcc778fcb24b Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg42.2a@gmail.com>
Date: Sun, 1 Sep 2013 23:14:31 +0200
Subject: [db] intercept possible division by zero

---
 luaotfload-database.lua | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/luaotfload-database.lua b/luaotfload-database.lua
index e77d4fd..bae90c3 100644
--- a/luaotfload-database.lua
+++ b/luaotfload-database.lua
@@ -2691,8 +2691,13 @@ local collect_statistics = function (mappings)
         pprint_top (fontstyle_name, 4)
     end
 
+    local mean_dsnsize = 0
+    if n_dsnsize > 0 then
+        mean_dsnsize = sum_dsnsize / n_dsnsize
+    end
+
     return {
-        mean_dsnsize = sum_dsnsize / n_dsnsize,
+        mean_dsnsize = mean_dsnsize,
         names = {
             fullname = n_fullname,
             families = n_family,
-- 
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