tied note in TabStaff is displayed if it's inside a chord which starts a glissando

[Federico Bruni]

By default, tied notes in TabStaff are hidden.
However, if the tied note is in a chord which starts a glissando (and no 
glissando starts from this note), the tied note appears.

It is not a regression, it happens in 2.14.2 as well.
But I think that it would be nice if it was fixed, if possible.


\version "2.16.0"

\new TabStaff \relative c {
  d8 e,( fis) a fis'4~ <c gis fis'>
  d8 e,( fis) a fis'4~ <c gis fis'>( \glissando
  <cis a\6>4) r2. |
}