Log Message:
Update libopenmpt to 0.2.5787:

* [Change] The Autotools build system does strict checking of all
  dependencies now. Instead of best effort auto-magic detection of
  all potentially optional dependencies, the default set of dependencies
  is now enforced unless each individual dependency gets explicitely
  disabled via --without-foo or --disable-foo ./configure switches.
  Run ./configure --help for the full list of options.
* [Bug] Some MOD files were erroneously detected as 669 files.
* [Bug] Some malformed AMF files could result in very long loading times.
* [Bug] Fixed crashes in IMF and MT2 loaders.
* [Bug] MTM files generated by UNMO3 were not loaded properly.
* Improved MTM playback.
* make CONFIG=haiku for Haiku has been added.
* Language bindings for FreeBASIC have been added (see libopenmpt/bindings/).