Function layerArg

common/script/progress_api.cpp:48–51

A layer index used to be cast straight to size_t and handed to ScriptConsole, whose range check then swallowed a negative one whole: the bar simply never appeared and the script had no way to find out. Checked here instead, so the mistake is reported at the call that made it.

    // bar simply never appeared and the script had no way to find out. Checked
    // here instead, so the mistake is reported at the call that made it.
    size_t layerArg(const ScriptArgs& args)
    {
        return (size_t)args.numInRange(0, 0, (int)ScriptConsole::MAX_LAYERS - 1);
    }
}

void ckpt_progress_begin(struct ParseState* Parser, struct Value* ReturnValue, struct Value** Param, int NumArgs)