[luatex] luaotfload-tool

[Herbert Voss]

If a font isn't found it shouldn't end with an lua error:

voss at shania:~> luaotfload-tool --find "MyriadPro-Regular"
luaotfload | resolve : Font "MyriadPro-Regular" found!
luaotfload | resolve : Resolved file name "MyriadPro-Regular.otf"


voss at shania:~> luaotfload-tool --find "MyriadPro"
...texmf-dist/tex/luatex/luaotfload/luaotfload-database.lua:890: attempt 
to perform arithmetic on field '?' (a nil value)


Current TL2013:
voss at shania:~> luaotfload-tool --version

luaotfload-tool version "2.3b"
revision "2331b6838f623d4800e79e92c50ce55f955d7776"
database version "2.207"
Lua interpreter: stock; version "Lua 5.2"
voss at shania:~>