Take path to types.def as first argument

diff --git a/protogen.lua b/protogen.lua
index 66b433d869ae894c48bb569440fed7eb2aca2014..32addd264673358ff7b9a4ab7fea714f827f4f6a 100755 (executable)
--- a/protogen.lua
+++ b/protogen.lua
@@ -3,7 +3,7 @@ require "luax"
 
 local h   = io.open("types.h",   "w")
 local c   = io.open("types.c",   "w")
-local def = io.open("types.def", "r")
+local def = io.open(arg[1] or "types.def", "r")
 
 local function emit_h(str)
        h:write(str)