bug#26552: [patch] nlinum margin width calculation (emacs <25)

[Eli Zaretskii]

> From: Christophe Rhodes <csr21@cantab.net>
> Date: Mon, 17 Apr 2017 22:26:56 +0100
> 
> I think the calculation that nlinum-mode does to guess the margin size
> in the absence of font width information (in emacs versions less than
> 25) uses the wrong bit of font information: the pixel size, rather than
> the font height.  Trivial patch below, which fixes the problem for me.

Isn't it a mere coincidence that this fixes your problem?  How can
height be a better approximation for width than size?  What are the
actual numbers in your case?