repeat volta bug in 1.3.96

[David J. Roundy]

Hello!

I have noticed that \repeat volta no longer prints the second repeat sign
(which is pretty important) if there is no \alternative.  :(  This shows up
in the regression-test on the first repeat in the repeat volta example, and
I'll attach a simple example script as well.  

I have only tested 1.3.96 and 1.3.74 on this.  1.3.74 works and 1.3.96
doesn't.  I am still compiling 1.3.97.

Thanks for all the great work on lily!
-- 
David Roundy
http://civet.berkeley.edu/droundy/

\header {
  title = "Repeat test";
  composer = "David Roundy";
}  

beginmatter = \notes {
  \time 6/8;
  \key a \minor;
}     

soprano = \notes \relative c'' {
  e8 d b gis a b |
\repeat "volta" 2 {
  a4 b8 c4. |
}
  e8 d b gis a b |
\bar "|.";}

mystaff = \context Staff = upper \notes {
        \clef "treble";
        \beginmatter \soprano
}

papersize = letter
\include "paper16.ly"  
\score {
        \mystaff
    \paper {
        indent = 0.0;
    linewidth= 17.0 \cm;
   }
}