Wrong glissando for notes with duration longa

[Thomas Morley]

Hi all,

in Staff-context glissando is wrongly positioned if between notes with
duration \longa

\version "2.19.65"
\new Staff { c''\longa \glissando c'' }

Bug is present for 2.18.2 up to current master.
Worked in 2.16.2

All other tested durations are working as long as a suitable notehead
can be found:
\new Staff { c''8 \glissando c'' }
\new Staff { c''4 \glissando c'' }
\new Staff { c''2 \glissando c'' }
\new Staff { c''1 \glissando c'' }
\new Staff { c''1*2 \glissando c'' }
\new Staff { c''1*4 \glissando c'' }
\new Staff { c''1*8 \glissando c'' }
\new Staff { c''\breve \glissando c'' }
% works in MensuralStaff
\new MensuralStaff { c''\longa \glissando c'' }
% no notehead in Staff, glissando is correct, though
% works in MensuralStaff
\new Staff { c''\maxima \glissando c'' }
\new MensuralStaff { c''\maxima \glissando c'' }


Cheers,
  Harm