Bugfix: gi might be nil

diff --git a/src/ltj-jfont.lua b/src/ltj-jfont.lua
index 05ee1fd..aa92ceb 100644 (file)
--- a/src/ltj-jfont.lua
+++ b/src/ltj-jfont.lua
@@ -654,7 +654,7 @@ do
            -- vertical metric
            local vw, tsb, vk = glyph_vmetric(gv)
            local gi = unitable[gv.name]
-           if vw and vw~=asc_des then
+           if gi and vw and vw~=asc_des then
               -- We do not use tsidebearing, since (1) fontloader does not read VORG table
               -- and (2) 'tsidebearing' doea not appear in the returned table by fontloader.fields.
               -- Hence, we assume that vertical origin == ascender
@@ -663,7 +663,7 @@ do
               dest[gi].vwidth = vw/units
            end
            -- vertical kern
-           if vk then
+           if gi and vk then
               dest = dest or {};
               local dest_vk = dest.vkerns or {}; dest.vkerns = dest_vk
               for _,v in pairs(vk) do