bug with x-gap for ties

[Werner LEMBERG]

The x-gap change in the example below makes the top tie (which appears
to be the second from top in the attached image) flip into the wrong
direction.  Well, some other ugly things can be seen also in the
image :-)


    Werner


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\score {
  \context Voice \notes \relative c' {
    s2. <bes4 cis f g bes cis> ~ |
    <bes4 cis f g bes cis> s2. |
  }
  \paper {
    \translator {
      \ScoreContext
      Tie \override #'x-gap = #0.3
    }
    linewidth = 40.0\mm
  }
}