Ligature horizontal rendering issue

Fixed bug when rendering a PDF with voice parts that contain ligatures.

_Example from rendered PDF before:_
![140611_ligature-test-parts-voice 2 -before](https://cloud.githubusercontent.com/assets/3244729/3247299/0b1e289a-f183-11e3-8c50-963690f30a18.png)

This problem was caused because the default ```PrintParameter.LINEXADJUST``` was set to high.

After setting a lower ```LINEXADJUST``` the PDF generates the ligatures correctly.

_Example from rendered PDF after:_
![140611_ligature-test-parts-voice 2 -after](https://cloud.githubusercontent.com/assets/3244729/3247356/7de13c78-f183-11e3-95e5-f97d76ca6a85.png)