Update to 3.99.5:

LAME 3.99.5  February 28 2012

* Rogerio Brito
* autotools: Fix compilation on alpha using proper ifdef guards. Thanks to Andres Mejia.
* Small correction of the documentation.
* Robert Hegemann
* Workaround for cygwin build problem. Tracker item [ 3480692 ] mingw-w64 compilation error
* Fix for a problem when LAME is compiled with fast floating point math. It could result in bitrate bloat with silent input data.
* Bug fix for tracker item [ 3486753 ] Artifacts at the beginning of decoded file

(wiz)