Re: [PATCH] Renaming non-X x_* identifiers

[Eli Zaretskii]

> From: Stefan Monnier <address@hidden>
> Date: Mon, 15 Apr 2019 18:01:52 -0400
> 
> BTW, instead of setting those hook function slots to NULL in
> text-terminals and then test for non-NULL-ness before calling them,
> can't we set them to `the_ignore_function`, which we could implement as
> a vararg function which does nothing?

I thought about that, but calling an empty function would add a small
inefficiency, significantly larger than just a test against NULL.
Besides, the non-NULL tests were already all over the place anyway.