keep splitAtDurations() call if makeNotation=False

Author: jacobtylerwalls

music21/musicxml/m21ToXml.py

@@ -2547,6 +2547,10 @@ def parse(self):
         elif not self.stream.getElementsByClass(stream.Measure):
             raise MusicXMLExportException(
                 'Cannot export with makeNotation=False if there are no measures')
+        else:
+            # QUESTION: destructive edit OK with makeNotation=False?
+            self.stream = self.stream.splitAtDurations(recurse=True)[0]
+
         # make sure that all instances of the same class have unique ids
         self.spannerBundle.setIdLocals()