Direction of repeat tie

[Stefan Maier]

Code like the one bellow delivers a repeat tie with wrong direction in the 
second alternative of the first vioce. How can I change the direction of the 
tie? (Use Version 2.8.2 on Windows system)

Thanks a lot


Stefan @Munich


\relative c' {
  \repeat volta 2 {
    << { f1~ } \\
       { c4 c c c } >>
  }
  \alternative {
    {
      << { f1 } \\
         { c4 c c c } >>
    }
    {
      << { f1\repeatTie } \\
         { c4 c c c } >>
    }
  }