Does anybody use #(add-music-fonts ?

[Urs Liska]

Hi all,

while working on some improvements in font handling I would like to 
change the interface to the add-music-fonts procedure in scm/font.scm.

A convert-ly rule could be added to set this argument to an empty 
string, which would work well.

But git grep indicates that this procedure isn't used anywhere outside 
font.scm, but it is defined publicly.
So it might be safe to change the interface by adding one argument to it?

Any opinions?

Urs