[Trunk] Saw Wave isn't selected in Mixer

1. Open score (created by 1.1 - Saw Wave selected).
2. Open 'Synthesiser'.
3. Choose general soundfont (such as GeneralUser_GS_1.43-MuseScore.sf2).
4. Close 'Synthesiser'.
5. Open Mixer.

Expected result: Saw Wave is selected.
Actual result: Saw Lead is selected.

Discussion: If you change and save it in the trunk, it'll appear correctly in the future. 1.1 displays it correctly, so it's likely to be an issue just with the trunk.

Using MuseScore 2.0 Nightly Build (4641) - Mac 10.6.8.