Broken stem tremolos

[Neil Puttock]

Hi Reinhold,

I've been looking at Haipeng's `Harmonious' score, and it's thrown up
a problem with single note tremolos when they're not sequential:

\repeat tremolo 4 c16

works fine, but

\repeat tremolo 4 c16\mf

results in an incorrectly scaled note, since `make-repeat' reads the
dynamic as the second child of the repeated music (the same happens
with other events encapsulated in the EventChord, such as
articulations).

I've added a patch which fixes this by setting the child-count
correctly.  Does it look OK?

Cheers,
Neil

0001-Fix-bare-stem-tremolos.patch
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