Problem with glissandi in 2.15.15

[Nick Payne]

I'm using glissandi to indicate slides in fingering. The following code 
should give me a glissando between the fingering digits (it did in older 
versions), but on 2.15.15 I get no glissando at all:

\version "2.15.15"

\relative c'' {
    \override Fingering #'staff-padding = #'()
    \once \override Glissando #'extra-offset = #'(0 . 1.4)
<d-1>4\glissando <cis-1>
}

Nick

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