Scheme function in snippet not working anymore

[Francisco Vila]

Hello again,

I think the Scheme in this snippet does not work as expected in 2.15

http://lilypond.org/doc/v2.15/Documentation/snippets/fretted-strings#fretted-strings-bar-chords-notation-for-guitar-_0028-with-text-spanner_0029

where the \bbarre function does nothing.

The same in 2.14 looks right. I'm afraid I can not say what's wrong.

Source is in 
Documentation/snippets/bar-chords-notation-for-guitar--with-text-spanner.ly
-- 
Francisco Vila. Badajoz (Spain)
www.paconet.org , www.csmbadajoz.com