[LilyJAZZ] MetronomeMark.style broken in 2.19.0?

[Marc Hohl]

Hi list,

I use LilyJAZZ in one of my latest projects. Thanks to Harm's patch,
it was possible to use the Jazz font in tempo markings, but this
seems to be broken:

\version "2.19.0"
\include "LilyJAZZ.ily"

\score {
   \new Staff {
     \jazzOn
     \override Score.MetronomeMark.font-name = "LilyJAZZText"
     \override Score.MetronomeMark.flag-style = #'jazz
     \override Score.MetronomeMark.style = #'jazz
     \tempo "Slowly" 2 = 60 c'1
   }
}

The font is right, but the note appears in the wrong style.
I know that this worked some time before 2.19 but I don't see
any changes in the sources that might have lead to this erroneous
behavior.

Any ideas what's wrong here?

Marc