partcombine bug - missplaced rest

[Karol Majewski]

Missplaced rest when notes are tied.

\version "2.17.28"

first = {
  c'1
  d'1~
  d'1
  R1*4/4
}

second = {
  R1*4/4*4
}

\score {
  \new Staff <<
    \partcombine
      \first
      \second
  >>
}