Obtaining the dimensions of a glyph (or a stencil) within c++

[Marc Hohl]

Hello,

I am still working on a proper way to include the varsegno sign (issue 
#659).
Displaying the varsegno itself with various combinations (repeat signs etc.)
works already, but for span-bar.cc, I'll have to remove the varsegno 
sign itself but
the spacing should be the same, so basically, I need to know the width 
of the sign.
I could hardcode the value, but this seems to be rather crude.

I have

Stencil segno = Font_interface::get_default_font (me)->find_by_name 
("scripts.varsegno");

How can I get the width of the glyph? Or alternatively, can I get the 
width of
the stencil defined as above?

Thanks in advance

Marc