Connected arpeggios may collide with previos chord.

[Robert Clausecker]

Hi lilypond team!

While typesetting a piece, I found this bug:
An connected Arpeggio may collide with the previous note when having
chords in multiple voices.

I tried to reduce the example to minimum, the leading note is needed to
make the bug happen.

\version "2.13.18" %current trunk
\score {
  \new PianoStaff {
  \key des \major
  \time 3/4
  \set PianoStaff.connectArpeggios = ##t
  des' << <bes'' c'''> \\ bes' >>
    << <ges''  ges'''>\arpeggio \\ <es'' des''>\arpeggio >> |
  }
}

Hope this helps and isn't already reported, as it seems to be similar to issue 
880.

Yours, Robert Clausecker.