int error = InitLibrary(lua_State *L);
lua_State
has been setup correctly. For example, a plugin might want to setup some
metatables or push additional helper tables into the stack. It's impossible to do
such things in InitPlugin() since the lua_State
isn't ready yet at InitPlugin() call time. That's why
this function is available. Many plugins, however, probably don't need to do
anything here at all.
InitLibrary() has to return an error code or 0 for success.
lua_State