Fix #324232: after a MIDI export without expanding repeats, those are not played in the current session anymore either

Backport of musescore#8979

Author: Jojo-Schmitz

libmscore/rendermidi.cpp

@@ -2309,11 +2309,13 @@ void Score::renderMidi(EventMap* events, const SynthesizerState& synthState)
 
 void Score::renderMidi(EventMap* events, bool metronome, bool expandRepeats, const SynthesizerState& synthState)
       {
+      bool expandRepeatsBackup = masterScore()->expandRepeats();
       masterScore()->setExpandRepeats(expandRepeats);
       MidiRenderer::Context ctx(synthState);
       ctx.metronome = metronome;
       ctx.renderHarmony = true;
       MidiRenderer(this).renderScore(events, ctx);
+      masterScore()->setExpandRepeats(expandRepeatsBackup);
       }
 
 void MidiRenderer::renderScore(EventMap* events, const Context& ctx)

libmscore/score.h

@@ -1335,6 +1335,7 @@ class MasterScore : public Score {
       void setPlaylistClean()                                         { _playlistDirty = false; }
 
       void setExpandRepeats(bool expandRepeats);
+      bool expandRepeats() const { return _expandRepeats; }
       void updateRepeatListTempo();
       virtual const RepeatList& repeatList() const override;
       virtual const RepeatList& repeatList2() const override;