Fixed stupid initial refcount bug in rchm_New()

While rchm_New() actually claimed to set the initial handle
refcount to 1, it set it to 0. Since Audiality 2 actually
uses this in a few places, that might explain a fair bit of
weirdness... (It doesn't strike as hard as one might think
at first, as a zero initial refcount isn't actually detected
until someone releases the handle.)