Multiple Endings Problem

[William Marchant]

I am using the code below to set up two different endings for a song.  
The code shown automatically puts
a Repeat Start bar line at the beginning of  of Bar 29.  I would like to 
suppress it but can only do so with a Tick Bar Line.  This looks a bit 
odd. No other Bar Line seems to work.  Is there a method for what I want 
to do?
Bill

 \repeat volta 2 {bf'8~ bf a a g4( f)| } %Bar 29
  \alternative{ { c2 e4( g4) |f1 |  r2 r4 g8( f) \bar ":|."} %Bar 30 31  32
                {c2 e4( d' | c1) |c4( c bf) a( |
                 c4. bf8 a4 bf)} %Bar 33 34 35 36
  }