using the waveout module.
  * ./bootstrap: we ignore comments when parsing makefiles.
  * ./modules/audio_filter/converter/fixed32tofloat32.c: changed this module
    so that it also does float32tofixed32.
  * ./modules/*: ported a few other modules to WinCE (most of the time it's
    just a #include <errno.h> that needs to be removed).