comparison runner/MIDIFeatureWriter.cpp @ 152:db83ea0e102d jams

Make the JSON well-formed (though still empty), except in the case where we are asked to write more than one file's features to the same output file or stdout

 		throw FileOperationFailed(filename, "MIDI write");
             }
 	}
     }
 
+    m_notes.clear();
+
     FileFeatureWriter::finish();
 }