libsndfile has buffer issues when pitch is increased

[Ghabry]

Which results in small crackles.

Test case: https://easyrpg.org/downloads/tmp/easyrpg-3ds-audio-test.tar.bz2
TestGame-2000-WAV, listen to the title music.

[Ghabry]

@ChristianBreitwieser
Could you take a look at this (or listen to it) while you are around?