Wrong tonic identification result returned in joint analysis

[sertansenturk]

As stated in MTG/dunya#413, there are some audio files where tonic identificaiton did not work in joint analysis. An example is http://dunya.compmusic.upf.edu/document/by-id/5e2153e4-03fc-47a7-b91c-67c085ada644/jointanalysis?v=0.1&subtype=tonic

Earlier, I found out that the problem is in the score-informed tonic identification in joint analysis. Somehow the tonic value is not returned but the alignment etc. are done without a problem. It's quite strange.

I couldn't pinpoint the problem yet because the problem seems to be on the MATLAB side.