Merge commit '239d02eff3ffe9f7d40caa21dde50fb4a0e94c24'

* commit '239d02eff3ffe9f7d40caa21dde50fb4a0e94c24':
  avisynth: Cast to the right type when loading avisynth library functions

This commit is a noop, we are using dlsym() instead of GetProcAdress().

Merged-by: Clément Bœsch <u@pkh.me>