Enabling GLM_FORCE_DEFAULT_ALIGNED_GENTYPES makes glm::vec3 16 bytes (padded),
but the listener orientation was passed to alListenerfv as
reinterpret_cast<ALfloat const *>(glm::vec3[2]). With the padding the six
floats OpenAL reads are at.x, at.y, at.z, PAD, up.x, up.y - the 'up' vector is
taken from padding garbage, corrupting the listener basis (right = at x up) and
swapping left/right of every positional sound.
Build the 6 floats explicitly instead of reinterpreting a padded vec3 array.
