Hidden note erases dotted note from chord in the first voice

[Anthony]

> I'm not top posting.  Nope.  Not me.

I wouldn't expect a hidden note to be able to erase the dot from a dotted note
from a different voice but that is what currently happens.  Again, there is an
alternate way to get the notes tied together using \stemUp and ignoring clashing
stems but I usually use this method to avoid having to ignore that message all
the time.  This might be the first time I tried it with a dotted note though...

Again, the bug is that the dot on the dotted note that should be visible from
VoiceA is getting "erased" by the hidden dotted note used for the tie in VoiceB.

\version "2.13.16"

%The hidden dotted note is somehow removing the dot from VoiceA's bottom note in
measure two.

%I realize I could use \stemUp and split the chord up and ignore the clashing
note column message but I figured I would report the somewhat suspect behavior
of this case...

\paper{ ragged-right=##t }
\parallelMusic #'(voiceA voiceB voiceC) {
  \time 3/4
  %VoiceA
  \clef treble
  a2. ~ |
  %VoiceB
  a8 a, c a' b, c ~ |
  %VoiceC
  \clef bass
  <f c' f>2 <g d' g>4 |
  %Measure 2
  %voice A
  <c, a'>2. |
  %VoiceB
  \hideNotes
  c2. |
  %VoiceC
  <a e' a>2. | \bar "|."
}

\score {
  \new PianoStaff <<
    \new Staff {
      <<
        \relative c'' \voiceA
        \\
        \relative c'' \voiceB
      >>
    }
    \new Staff {
      \clef bass <<
        \relative c, \voiceC
      >>
    }
  >>
}