Tuplet notehead shared with non-tuplet notehead in another voice?

[Thomas Scharkowski]

Hallo list,

I'd like the second note in voice one to share the notehead with the 
last one in voice two. This is quite common in 19th century guitar music.
Thank you,
Thomas

--
\version "2.19.3"
{
  \relative c'' {
  \time2/8
  <<
  {
    c8..[ c32]
  }
  \\
  {
    \tuplet 3/2 8 {
    c,16 e g e g c
    }
  }
  >>
  }
}
--