changing flag style/stencil should affect metronome mark, shouldn't it?

[Karol Majewski]

Hi there,

I don't see how can change flag style (stencil) in metronome mark.


\version "2.17.9"
{
  \override Flag.stencil = #old-straight-flag
  \set autoBeaming = ##f
  \tempo 8 = 120
  c'8 d' e' f' g' a' b' c''
}

I wish *\override Flag.stencil = #old-straight-flag* worked. Unfortunately,
it doesn't.