ReadyTalk/avian — pull request #324 by dicej (2014-08-17 21:38:00+00:00)
Title: explicitly override UNUSED definition

Recent versions of jni.h such as the one provided by Debian Jessie's
OpenJDK define UNUSED in a way that conflicts with our definition and
usage, so we need to explicitly undefine it before redefining it to
avoid compiler noise.